I think winning something no matter how small is addicting. You win a little bit and you start to go oh, I like this, and I want to continue it. Now what's strange is what happens when you don't win. I placed a sports bet the other day and it was a "push" or means the funds are returned because a player retired from the match
https://nitrogensports.eu/betslip/f216fafVnp4Y3dSbjdobUdFTVRKRTREODYvZz09/r/2744 and after this EVEN THOUGH I didn't lose anything, and got my original stake back I still felt like I had missed out. There's this expectation of winning every time you place a bet, but the reality can be different.