This site was great till about a year ago.
The free part is only a trap. Once they get your membership (which is usually for the year) the rest of the time they will try every trick in the book to have you buy gems and one never wins any coins. This is a trap.
Just go to their help section & read the complaints or go to their costume promotion sits vegasworldpress.com and read the complaints there. Once one proves that their complaint is right, you get banned from that site.
Scammers, hackers, rude people etc have become so bold there (since management takes no action or when its very late) that people are quiting that site daily.
The CEO is now catering to only the elites on that site, as do all the moderators.
If one is interested in becoming a member there, please go on the monthly plan (if they still have it) and try it out, but, if one goes on the yearly membership, you are stuck.