I did a Dogecoin deposit yesterday, played a little and withdrew wih instant payment.
Sounds very suspicious.

What? Why?

I was trying to make a joke. Not a very good one, sorry.
The basis of the joke is that whether the site is a scam or not they are likely to be allowing withdrawals at first and so your experience doesn't really help us know anything about them. But you're right, the joke didn't work.