Server legality

[Sianur]

Hi guys,
Sorry for posting something that has probably been answered few times maybe over the years (read some posts about it but they are very old), but I was wondering if there was any reason why Daybreak/Sony would sue admin or players that are playing an everquest emu server.
I have played few years on a very well known server, which allowed player to buy few items for real money, and I was wondering if I was under a specific risk, or the admin, thus me.
I know that Daybreak officially recognized P99 some time ago now, as it was obviously a "fan server without any risk of earning money", but I was wondering what was for the rest, especially the one I was playing on.

Thanks and sorry for the disturbance. It causes me head and stomac's ache