Yes : Coinbase holds your funds one week (you can trade right away but you have to wait 7 days to make a withdrawal or transfer)
Better to prevent this in the future : whenever you have extra $$$$ try to transfer it ASAP to Coinbase so whenever you need to load more money into Betanysports you'll be ready (once the hold is over the transfer is almost instantly)
It's safe to leave your $$$ in Coinbase (so there is no need to transfer it to Betanysports right away)
I think CashApp might be an option to do it fast .They allow you to buy bitcoins and transfer it to another bitcoin wallet right away .But they have high fees.Never done it so I don't know the details but I heard is possible .Better google it .
If I was you I'd just wait the week to be over ,besides the play 4 pool starts on sunday so you could be playing again in just 2 days (assuming you have Paypal to play the pool )