2 of those years were after I finished school and was just living rent free at home and gaming full time. During that time it was easly more then 12h a day. Though, a lot of that was just being logged in and idle while chatting on teamspeak or doing administrative work for the guild (we ran our own webserver out of a friends house for our forum/dkp system, etc). That’s how I learned programming.
There was also some account sharing, which was literally required to get to the top of the vanialla PvP ranking. Games were built different back then.
Honestly, I loved that kind of meta gaming, all the backdoor deals, even across factions. The drama when some group wouldn’t honour the list or agreements (Been on both sides of it).
I made rank 13, luckily I already had a better weapon from raiding, so I could skip the last one. Good times.