Looking for any server that has 2k+ players that are active. Any Rate will do.
AFAIK NovaRO is the only server at +2k, TalonRO used to have even more population than Nova but it tanked for some reason, dunno how many vendors.
If it's just the population what is important, you may be better off with the official server
Thailand servers have over 10k-25k players but the problem is that no english translations/updates/etc. Been there.
How many players do NovaRO have excluding the vendos and afks? Anyone?