i witnessed the same during a few months after pure pug signups many solo players who never did minigames started to be more active.
although only witnessed smaller guilds merging with big ones to be able to farm bori then bigest guilds allied together so they could farm bori whole day with a raid whenever enough people would gather to fight them they would only bring a second raid and then leave a raid of people farming whole day.
many left game over thbori and efect it did on guilds.
like i mentioned not allowing people to be in same team for minigames was just another factor in the failure of aoc pvp, or lack of pvp content to be more acurate.