What are the welcome bonuses in a social casino?

If I understand everything with regular casinos, then with social ones I still can’t fully understand the welcome bonuses. What kind of coins do they give for registration? Explain to me how it all works. I will be grateful for your help.

So you are currently registered in a regular casino, do you have any experience playing slots? The social casino has its own internal currency in the form of Gold Coins and Fortune Coins and they can be used to play slots. I received a Welcome Bonus Casino in the amount of 630000 GC and 1000 FC, I am registered in Fortune Coins social casino. By the way, are there any daily login bonuses in regular casinos? I receive 300000 GC and 100 FC every day for just logging into my account. You know that you can play in a social casino without making a first deposit?