It doesn't seem like he needs donations. It sounds like he needs lawyers and paralegals to expand to a proper firm, and it would be self-sustaining.

don't you think that a bunch of donations might be useful for this? call it crowdsourced vc if that makes it easier to understand.

Do not do that, he might retire... 1/2 :-)

Perhaps what is needed is a non-profit devoted to suing spammers. Then we could donate to that organization.

I'm sure this Dan guy works harder at fighting SPAM given his profit incentive.

I would think having a profit incentive means choosing the easy, low-hanging fruit rather than the hard cases that would take a lot of time and reduce the amount of potential profit.