There haven't been any reviews of this card in a while, so I figured I would break down the usefulness of Datasucker in the modern meta, particularly in light of the most-played Anarch breakers: the conspiracy suite.
Datasucker has been around since the original core set, and is often seen as the archetypal non-icebreaker virus. Historically, Datasucker has primarily been used to enable fixed-strength breakers. While those have fallen out of favor or rotated, Datasucker still sees some play alongside Aumakua, alongside which it doubles the value of certain runs. Other than allowing accesses via fixed-strength breakers, Datasucker counters can be used to save money, usually at an exchange rate of 1 counter = 1 for most icebreakers. However, this exchange rate is even better for the now ubiquitous conspiracy breakers.
While Paperclip, the favorite child, still yields the 1 counter = 1 exchange rate, Black Orchestra and MKUltra, infamous for their inefficiency, yield far better dividends when used in combination with Datasucker:
• 1 counter = 3 (3/counter): Archer, Cortex Lock, Data Raven, Fairchild 3.0, Hydra, Ichi 1.0, Inazuma, Little Engine, Macrophage, Mausolus, News Hound, NEXT Diamond, NEXT Gold, Oduduwa, Slot Machine, Surveyor(4+), Tollbooth, Trebuchet, Wormhole
• 3 counters = 6 (2/counter): Archer, Hydra, Little Engine, NEXT Diamond, Surveyor(6+), Trebuchet, Wormhole
• 5 counters = 9 (1.8/counter): Surveyor(8+)
• 2 counters = 3 (1.5/counter): Anansi, Archangel, DNA Tracker, Gatekeeper(first rez), Nebula
(Bold = most-played ICE as of writing (present in >7% of decks)