I'm really enjoying lemmy. I think we've got some growing pains in UI/UX and we're missing some key features (like community migration and actual redundancy). But how are we going to collectively pay for this? I saw an (unverified) post that Reddit received 400M dollars from ads last year. Lemmy isn't going to be free. Can someone with actual server experience chime in with some back of the napkin math on how expensive it would be if everyone migrated from Reddit?
I think the biggest cost will be image/video storage. The text takes very little space in today's standards. The good thing is that symmetric fibre internet connections are becoming more common so it may be possible for members of the instance to contribute unused disk space to help with its image/video storage. This plus limiting the image/video sizes (and maybe forbidding video uploads altogether) will allow the instances to scale with user count.
Sure, image/video is vastly more resource-intense, but it's not used for successful DDoS attacks and fiber connections don't stop them either. We need a better answer for horizontal scaling as servers currently aren't even closing registrations until they're already noticing performance issues and are vulnerable to relatively small increases in federated activity.