I don't think gamblers are gambling here only by signature campaigns. They have a fixed earning apart from the monthly signature campaign. In my case also I gamble a fixed amount of my total salary which I can afford. Its percentage may vary from time to time. I mainly prefer cryptocurrencies while gambling, depending on the situation sometimes I do it through stable coins and sometimes I do it through other cryptocurrencies. Some of my favorite gambling platforms include stake, sportsbet and others. I don't know if I am a responsible gambler, but I gamble as much as I can afford to lose.