I was doing a Toto-Rask Run today with my girlfriend and Linkshell mate, we needed one more member so like a responsible leader I put up a recruitment. So we were waiting outside for maybe another linkshell member to finish and join us. We found a guy waiting looking desperate and ending up taking him along.
So we were in the dungeon, and while you're in the dungeon you cant even kick or do anything in the party menu at all. No one can be added or subtracted from the party. My recruitment was still running. very shortly after we started the run, I got a tell asking if there was still room, and i decline and apologized. Another minute later, another guy sends a tell my way, in which i repeated my answer. So we finish a dungeon and just as we got outside a new member, using the party search function immediately joined. And then we did another dungeon run.
The best attitude to take when you see an opening you want is to not even ask if you're needed. Just join that bitch, because they already set the parameters, and you'll only be able to see the opening if you've met them. Don't send a tell and just join.