also i don't think you really fully understand how you implement pagination

you have to generate a list of matching event ID to do it, then the relay has to store it on a space limited query cache that expires after a time or volume

the idea to make a new query type that just returns these came from me thinking about that fact

it's the first step towards it, but it probably eliminates the problem altogether, seriously, 14000-21000 event id matches for a query without busting the current typical max response sizes?

DoS attack mitigation would not be relevant, that's a network layer issue not an application layer issue, in as far as it is a per-query limit not in the context of total volume from a client, that's not the same thing