Anecdotal point of data: M247 seems to run a lot of bad-faith traffic as well - while a service I run tries to keep block lists minimal even for frequently abused endpoints (eg credential stuffing) their ASNs are a mainstay in there.
Piracy and such hoarding are inextricably intertwined. If you want a particularly uncommon variant of some pirate content (like an obscure movie in any quality, or a somewhat popular movie in original BD format), you better grab it when it's available, as further down the line getting the exact same such content may be more and more difficult.
Streaming services have a similar issue (re-encoding, bad rereleases due to licensing issues, delistings, crappy format choices in the first place) but generally a bit better SLA-like and a longer timeframe to watch certain content.