I paid for online purchases of up to $900 in a single transaction, and everything went smoothly. However, I'm having issues connecting to Apple Pay that haven't been resolved even after several attempts at different times.

Deposits are only accepted in SOL or USDT (SOL). Also, there's a caveat: the service only accepts exact payments (deposits no more or less than the specified amount). Otherwise, your funds won't be credited and will be returned to you (this has happened to me).