I have promoted my ref link from Freebitco.in in my signature a long time ago when faucets were something new and gathered many referrals. To my surprise, 70% of them are still frequently active, of course, there are some weeks or even months some refs are not active at all (when BTC price is low), but the majority comes back when the price goes up again. I have also many who are active almost all the time and this is my biggest surprise to see them clicking all the time.

I think this is because they just like this website, just like me. I have never won there a big amount at once, but I still like to click a few times a day because it is bookmarked for years and I am just used to it. Additionally, they pay all these years with no problems and I already withdrew a lot of times slowly accumulated BTC. They added a lot of new games and offers, so I assume that's are the reasons why the old members stay there for so long, just like me.