I blocked the username that the ads are under and I haven't seen one since. It's great! I don't even know if they still advertise on reddit since I haven't seen one in quite a while. Highly recommend.

Edit: Suddenly, blocks no longer mean fuck all to this account. I'm getting the ads no matter how many times I downvote and block. Clearly, I'm not interested in this content, why are you showing it to me. Bring back the solar panels and cars and weird niche apps, PLEASE.