EuroMania is regulated by Curacao and powered by Skillonnet casino games. Both Curacao and Skillonnet do not accept citizens from the United States of America.
I sent an email to the EuroMania support to get a clear explanation. Here is their answer :
I would like to inform you that in respect of the USA Gambling Law, US players are allowed to registered account with our casino but you can play only in practice mode.
In the case that you want to deposit money on account and play in real mode no matter where you are your deposit will be declined.
As part of the US gambling law, EuroMania 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 EuroMania if you signed up from abroad. For instance if you are in vacation in Mexico or in Thailand, you could play to EuroMania while you drink your Mojito. However, you should not use a US address and an american credit card (from Bank of America for instance).
This is the same problem as "signing-up from abroad". You could use a VPN to play to EuroMania, but you would need to have a real address outside of the US (with utility bill at your name for instance). If you have a sister abroad, for instance in the UK, it could work. Otherwise, in case you win a $1,000,000 jackpot, EuroMania 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.