However, in the last few years, reporting spam and intrusion attempts to them has gone from something happening within 24 hours of reporting it to absolutely nothing at all being done about it, no matter how egregious the illegal activity.

I suspect they've "optimized" the moneymaking part of accepting money from spammers and scammers, and they've realized that having an abuse team that actually does something about spammers and scammers costs them money, and so they've decided to maximize profits.

I really wish I knew more.