I've seen way too many crypto adjacent "legal botnets" too and I dont think you could pay me enough to run some sketchy app like that, even if open source, even if fully vlan'd and isolated.
Unfortunately theres a lot of desperate people who will run random apps thinking it'll make them a quick buck.
GoblinSlayer
They pay developers of popular apps to add their botnet code to the app for money. As a result the app becomes botnet on next update.
Unfortunately theres a lot of desperate people who will run random apps thinking it'll make them a quick buck.