Anyone who paid with BTC already received his tokens?
not yet received

Not received mine yet.
me too, nothing. let's wait another day
I have tokens PAY, but I do not know how to sign the BTC address, so that the tokens came to MEW.
Tokens bought through wallet.btc.com
Help, please, to solve the problem.If you can't send signed messages through that wallet (I don't know the wallet in question), then you need to export your private keys and import them to a wallet which can send signed messages.
I was in the same situation. I paid from Exodus wallet. It can't send signed messages. I exported my private key. Installed Electrum. Imported private key. Sent signed message using that. Problem solved.
This is the best possible solution that I can see too. I used also this method but used mycellium to provide me signed message. Luckily I managed to regain my coins and proved
that this is my account, I thought that It will not be recoverable that time.