Notes:

• It's a “Double-Multiaccess-matters” effect: thus, it needs repeatable double-multiaccess (e.g. WAKE Implant v2A-JRJ after two HQ successes, The Twinning after two turns of “Companion’ing”, etc), or multiple stackable continuous single-multiaccess (e.g Docklands Pass during a Jailbreak run, Nyashia during a Trick Shot run, etc).
• It's an “Any-Accesses-matter” effect: thus (IIUC), breaching a nonempty HQ with two upgrades installed in HQ's root still counts.
• It’s a power counter-based count-up (not a countdown): thus, it can be charge’d twice, but only first “self-charging” once.
• Being unique, you can't charge up two copies off of the same breach.
• Being a resource with a BoT-trigger, it's vulnerable to tagging.
• “3 Legworks worth” of breaches can be hard to pull off, but zapping “2.5 Hedge Funds worth” of credits can be hard to come back from! (The Corp does have a turn to spend as much as they can, once it has reached three power counters, but you don't have to sacrifice it if they do ‘invest’ all their credits into rezzes, under the Bird’s “threat of activation”; so “mass–Forged Activation Orders’ing” them seems good.)
• Being a virtual, it's “Gachapon'able” (and tutorable off Meeting of Minds, FWIW).

Synergies:

• Multiaccess: Mercury, WAKE Implant v2A-JRJ, The Twinning), Docklands Pass, Legwork, The Maker’s Eye, “Pretty” Mary da Silva, Nyashia, etc.

• (Resource-)Charging: Captain Padma Isbister, Stoneship Chart Room, Flux Capacitor, etc

Related:

• run-based econ-denial: Diversion of Funds, Hijacked Router, etc.

• access-scaling econ: Zahya Sadeghi, Psych Mike, etc.

Compare: Overclock × The Maker’s Eye × Marathon

Trick Shot pairs a Subsidized Run with both an R&D Multiaccess and a (Clickless) Remote Run.

And it really feels like a trick shot: you're bouncing around all over the place, knocking several billiard balls into different pockets.

IIUC, by moving around a Chisel before each approach, Spree can accrue up to 3 virus counters on it off a single run, while also shrinking all three ice on a server by an average of at least −2 strength each (cf. a local K2CP Turbine), even post-purge. Or, off just one of Spree’s three ‘charges’, you can move a big Chisel onto an brutal piece of ice (like an Anansi or Trebuchet) that's outermost, after having built up several counters on it by running through or bumping off a gentle piece of ice (like an Ablative Barrier or Ping) that's elsewhere, which UAV can't do (even if it could yank back viruses, it would reset their counters anyways).

P.S. Design-wise, my favorite Shaper effects are the “moving stuff around”:

• re-hosting trojans between ice (Spree, Urban Art Vernissage);
• swapping ice between servers (Tāo Salonga, Escher, Inversificator, Cordyceps);
• re-arranging cards within a deck (Indexing, Cataloguer);
• “spinning” (uninstalling+installing) programs between zones (Simulchip, Scavenge, World Tree);
• “painting” between ice subtypes (Pelangi, Panchatantra, Paintbrush);
• and moving power, virus, or even advancement counters between installations (cf. a “Trick of Light × Exploratory Romp”)…which haven't been printed yet.

(So I hope Spree will still see some play in Arissana, despite how good Burner and Trick Shot will be in any Shaper.)

Flavor:

“The Third Directive requires a bioroid to preserve THEIR ability to function and report frequently to Haas-Bioroid for REVENGE and UPRISINGS.”

By the way, this reminds me of a subplot in Quarantine (the 1992 scifi novel by Greg Egan).

Nick is implanted with an illegal 'Loyalty Mod', which causes him to earnestly and truly believe in the goals of the Ensemble. He is used as a security guard for the project the organization is secretly working on, a new neural mod perfected by studying Laura.

Nick eventually meets a group of Ensemble members who, like him, are under the control of the Loyalty mod. They explain to him that the loyalty mod only specifies their loyalty to the Ensemble, but fails to specify what the Ensemble actually is. Therefore, via logical argument, the group (calling itself the Canon) decides that as by definition the most loyal members of the Ensemble, what the Ensemble is is up to their personal interpretations.

In Startup right now there aren’t a lot of options for Anarchs when it comes to in-faction Icebreakers. It is this or Mimic. As Mimic has difficulty dealing with strong Sentries, it is nice to have this card as an option for Anarchs to run for no influence cost alongside Mimic in case the corp puts out something scary like Cloud Eater.

On efficiency, Boi-tatá pales in comparison to Mimic on most of the Sentries with 0-3 strength even if the Runner has trashed a card. The only weak Sentries it handles at a better rate are Tithe and Rototurret - and even then only if the Runner has trashed a card.

When looking at Strength 4 Sentries (Ansel 1.0, Ballista and Hammer), Boi-tatá runs into the awkward issue of those ice having either 1 or 3 subroutines. It is therefore particularly bad at fully breaking them when unsupported by a trashed card (5 for Ballista, 7 for Ansel or Hammer), though after a trash it becomes a much more palatable 3 or 4. However Mimic supported by Leech or Ice Carver can do the same job for 1 or 3 credits.

Then there are the big boys - Archer, Cloud Eater and Seraph. These three are tricky even for a supported Mimic to break. Boi-tatá without a trashed card breaks these for 10 which is awful but at least possible. With a trashed card though, it can break them for 6 which is a pretty excellent rate (Carmen - queen of Killers in Startup - needs 8 for Archer and 7 for the other two).

So for Startup a single Boi-tatá as an accompaniment to Mimic could be worth a look just as insurance against the big Sentries. It helps that the strength-lowering effects that are strong with Mimic deck are also quite good for Boi-tatá since they can help it overcome its biggest weakness in how inefficient it is to pump it against Sentries 1-2 above its strength.