I also observed the same as well, and of course their coming back would really make them active over here as they would keep gaining more attention.

But what makes gambling sites gain attention?
Here are the common secrets;

(1) Gambling site should be that transparent
(2) Instant withdrawal and deposit
(3) Less kyc restrictions that is; quick and swift verification.
(4) Active customer support
(5) Active on their Ann thread.
(6) Free giveaway on their social handle, such as Twitter, Facebook, IG and their Ann thread.

When gambler noticed all these in a gambling site it becomes that easier for them to come use that particular site, again they should also try to run a long last campaign maybe 1 years above they would definitely become the big bomb over here just as other casinos that has ran signature campaign for 3 to 5 years now has became known in the space.