Mine does it too, although it started off as matched betting, and now he ‘plays the sites at their own game’ and ‘never loses’.
Last month he ‘won’ and subsequently lost £800. All comes from his own accounts, not joint. He still, according to him, has never finished a month down, but he spent literally hours glued to his computer chair while we got on with family life around him. All to end the month £247 better off. That’s a big loss to him in my opinion, DS is only 5 and the time while he’s little is flying by.
Get savvy, I am, slowly, while I work out a long term plan. He had spreadsheets on the computer saying what was coming in and out. He belongs to a website called ‘outplayed’ that tracks winnings and they have a chat forum where loads of them compare notes. I took screenshots of everything and if he’s doing the same you should to. He is more transparent in some ways now because we had a HUGE falling out about it when I nearly left him, but I still do not fully trust what he tells me and never will again, so that’s very sad- he broke that.
slightly different in my case as he does pay for holidays etc but he’s always buying himself bits and bobs whilst I sell and buy on Vinted for things I need, go without haircuts etc. everything he chooses to do with the money is on his terms, always. I know he has £50k dotted around on various platforms, and I’ve kept all the evidence I can. I’m learning how to be more financially savvy and get on top of everything coming in and going out. I always left the admin of finances to him- not anymore.