Wikipedia is able to pull that off because wikipedia is a digital encyclopedia, not a social forum to add comments to or respond at a massive scale like lemmy is or reddit was. A majority of services either get their revenue from ads, or they start off not doing that but eventually have to cave in and let ads in.

I think ads can be annoying sometimes, but if they’re done in a similar way reddit did them before their downfall, then it would be tolerable and at least give the lemmy.world admins enough money to cover server running costs

I feel bad for the lemmy.world admins that have to keep up with the software needed and costs accrued to handle the world knocking on their doorstep. I hope advertisers hit them up soon so their bills become easier to pay. While advertising was annoying on reddit, I’m more than willing to put up with it on this instance of lemmy, the admins have earned it.