I have played them and I think that this is how you do them. On another post it said to use a different country just for the download part.
This is from a different site that explains how you can do it:
One key thing to note with this site is that if you’re in the US and try to initially signup on the casino side, it won’t work, as they claim to ban US players. Click on the Poker tab on their site and create an account there, as for some reason they allow that. Then you can log-in to the non-download casino at the following link:
http://www.totalbet.com/casino/ and deposit money to get the monthly casino match.
So, it appears that you can only play on their no-download casino but they're both nice monthlies.