Max event size: Please allow events up to 65,536 at least. I've seen relays blocking my follow list of 177 people because it was greater than 16,384. Long follow lists will be 64k or even more.

Auth: Please allow plebs who aren't signed up to read the events posted by your paying customers. Nobody is going to sign up to all the paid relays where all their customers post to. Sure, charge to post, but charging people to read those posts is IMHO a bad idea. Everybody else: stop paying such relays for their service, they are doing you a disservice by hiding your events from most of the people on nostr.

Max subscriptions: Please allow at least 16 (preferably 24). I do a lot to try to combine subscriptions instead of making lots of little new ones, but combining subscriptions often means downloading the same events over again, which you really don't want me to do anyways, do you? Even playing tricks to try to limit subscriptions, I still hit limits on relays that refuse more than 10 subscriptions. You can easily hit that with: following notes, my own config, metadata batches (4 or 5 might be in flight), inbox events, "load more " chunking can be another 2-5 subs (I add new subs so that i don't redownload the same events yet again)

Feel free to block scrapers: filters should have either ids set, or two out of three from (authors, kinds, tags).