Playing devil’s advocate here - even if you use an ad blocker, Reddit may still benefit if you are contributing to the site with posts, comments, etc. because that helps draw other users in. Even if your traffic costs then money (as it does any site you visit without ads), the net gain might (I don’t know the actual numbers) still be worth it for them. I don’t know how well that math checks out (honestly it probably doesn’t), but that’s why a lot of companies will operate at an extreme loss for the potential to get money in the future (pre-musk Twitter, Uber, etc.)

To be clear I mostly disagree with that reasoning. I think running an ad blocker when you visit reddit and not providing any meaningful contribution (i.e. only protesting) could have an impact if it gains enough continuous traction.