oh sure, that should be explicit, I agree. 
So, for ApocWorld, I’m running this for the first time, but given the somewhat sandbox-ish style and the player-driven narrative, I guess two or three more sessions are in order at least. So it was definitely not a one-shot. Hard to say how many sessions it will/should be, but I’m aiming for, say, three more and let’s see if that gets us finishing an arc or whatever…? So yeah, that’s probably a small campaign right there 
For Dogs, it’s very episodical in its gameplay. Each town is supposed to be one session long. (I rarely ever made that, so far, I usually need two sessions)
So theoretically, there could be different PCs every week, because player absence can be justified by the character having been called elsewhere where s/he is more direly needed atm. (think FBI agents investigating a case, then getting pulled off it the next week)
So, Dogs is real easy that way. In fact, one can pretty well reserve the game for weeks when only 3 or 4 people can make time, and then play it with those few, whoever they are. Right now, I’m aiming for 1 or 2 sessions (for each smaller group I guess), just to try out the system and see if it would be fun to do some more sessions in it or not.
(forex, Alrik also knows Dogs, and while I don’t think he has run it before, maybe he’d like to run a town or two for us sometime? Or someone else gets motivated and wants to try their hands at it? Dogs is a good game to do this with.)
Now, why I protested so early in this case, is just because we specially waited til Tam was back to begin with Dogs,and now 4 people have already announced interest, but none of them was Tam 
I’m of course glad that Darth and GJ are also interested in the game! Three weeks ago, it looked like no more than 2 people were motivated to try it… but now, with upwards of five players incoming… I like to get things out in the open, and in this case there’s just a hard cap (for me) as to how many players the game can take.
(I had a massive GM’s hangover after the recent ApocWorld session as well
Do any of you also get these, btw? 6 players is a lot to handle, especially in the improv style an AW first session demands. I expect it to get better from here on out, though, as things have taken shape by now and the game gets a more predictable direction with each session I presume. Gods help me if that is not the case
)