I've been here for about seven days now and I've gotten six of these invites. I'm surprised that I've gotten so many considering how much they sell for- maybe that's completely normal but I'm still very new and have no idea; is there any kind of correlation between something and them being handed out or are they really just random?

I'm just curious :3

...100% random, I've heard of some people having a month or two between invites, and the occasional lucky streak such as you've had.

Woah, good to know! I guess I've just lucked out- thanks for the info! :D

I usually get one or two per day from quests, battle quests.and restocking. I've got more that I can spend, so I sell mine.

Wow you're in luck! At best I can randomly get three in one day, but usually have to wait a month or two before that happens again