No. Phil's "proof" is one of LTGs regular sub whales gave to him, and supposedly Phil didn't get the money like when people give Argentinian sub bombs for lulz. First off, they're still legitimate subs, who cares? And second, this requires believing Phil.
Personally, I think both Phil and Dale fake contributions. Many streamers do it, it's a proven effective manipulation tactic on parasocial idiots, and they're both scumbags with no decency (and in Phil's special case, artificially soothe his ego sticking it to detractors by appearing sussessful). But, there will never be a way to prove it outside of someone hacking all their information, so whatever. It's on donators to stop being stupid.
Yes, but as you say it's the way Phil always is when someone is no longer of use. Like with the builders of his PCs, like John Rambo and Howard after moving and being unable to use them to make any content with them, like TopTierBrian and such who genuinely played games with him and were "friends" until bigger online names like KC came in the picture.