It all depends. The last few months are the slowest and with football season around the corner, your fortunes may turn. I don’t know which country/continent you advertise to, but should be the same everywhere.
As a rule of thumb – don’t advertise sports betting and casino on the same program. Due to the negative carryovers you are bound to surrender you casino wins to your sports betting loses (or vice versa).
Also, if you advertise to a country with legal online sports betting – always go with sportsbook that does not carry over, this is very important.