In addition to the $50 daily, the ad spend will also be paid BEFORE the ad starts spending to alleviate any risk on your end. Generally, we pay in PayPal but considering this is a forum we are happy to pay in crypto, either BTC or USDT.
Being new account I would be wary, but I feel like it's a "second" account of somebody else or it's somebody who did his homework.
I find good to see you offer crypto payments and I strongly recommend everybody get
upfront crypto payments instead of the reversible PayPal and because there's no escrow.
I don't know if something is indeed fishy or not with this campaign, but unless OP comes with clearups, I would not use my primary Google account for this, if possible.
And for OP and possible advertisers, maybe posting in the forum is also a good idea, especially as newcomers have time limitation between PMs and also some users may have blocked the PMs from newbies.