Betclic is regulated by Malta and powered by Netent casino games. Both Malta and Netent do not accept citizens from the United States of America.
I sent an email to the Betclic support to get a clear explanation. Here is their answer :
Thank you for your email.
Kindly note that we do not allow customers from the United States of America to have accounts at BetClic.
We apologize for the inconvenience caused.
As part of the US gambling law, Betclic preferred to step back from the US Markets. However, some online casinos still continue to accept US citizens. Check our top 3 US Casinos.
Technically, you could play to Betclic if you signed up from abroad. For instance if you are in vacation in Thailand or in Indonesia, you could play to Betclic while you drink your White Russian. However, you should not use a US address and an american credit card (from Citibank for instance).
This is the same problem as "signing-up from abroad". You could use a VPN to play to Betclic, but you would need to have a real address outside of the US (with phone bill at your name for instance). If you have a relative abroad, for instance in the Ireland, it could work. Otherwise, in case you win a $2,000,000 jackpot, Betclic could block your funds..
We know that Bovada is currently accepting US citizens. It is powered by Top Game software and offers a nice welcome bonus.