The idea there being some kind of "gotcha" interview or whatever I don't think will ever happen. As has been stated already, Phil will just lie or retcon or whatever he thinks is best for him at the time, regardless of how hard or soft the interview is. The Steve interview was about as confrontational as it's going to get, and I don't imagine that Asmondgold's chat with him will be as informed or pointed. He said himself that he simply thinks that it will be funny, and I think it will be too, but this is not some forensic interview; to me it's him just wanting to hear how Phil plans on spinning things, how Phil plans on explaining how he's not actually a beggar or a bad person.
Having said that, I am looking forward to the interview the same way I look forward to every time Phil is given a platform to "explain himself" - Phil is going to absolutely hang himself. Again. This time in front of 30k+ viewers live and millions after the fact. If any reasonable person spends any amount of time listening to him prattle on they invariably will come away thinking he's a joke at best or a downright scumbag more often than not. I see no reason for this to not be the case with Asmongold and his audience, and by extension all the incidentals who will either stumble upon or learn more about Phil via this exposure. It will be the biggest stage for Phil to fuck himself over on in recent memory, and he will undoubtedly do so.
If in the unlikely event Phil acquires a whale or whales out of this - so what? I don't give a shit about Phil receiving money, he was embarrassing back before he was actively begging anyway. It is funny to watch him squirm, desperate for the money buff, but I mean the funniest shit to me is still his unnatural ineptitude at games. It's also already very apparent that he'll beg anyway, so it's not like this will move the needle at all. The money, regardless of amount, is gone as quick as it comes in. If you're dumb enough to give money to Phil then you also probably shouldn't have money, so in a way it's just nature working itself out. Given how little he's gotten out of this "drama" already, I doubt this is a future we're likely to exist in anyway.
TL;DR Interview will be funny. Phil will embarrass himself to millions of roachlings. Potential profit for Phil is as inconsequential as it is unlikely.