[nandhp]

This sort of effort has existed for a long time, e.g. SETI@home and the Great Internet Mersenne Prime Search (although they don't tend to pay people). They've faced many of these same problems, and presumably devised minimum overhead solutions.

[zitterbewegung]

Yea but their workload is much harder to fudge and the solution they use to confirm primes is running the task twice . Training of models can be shortcutted or even maliciously tampered with.