I apologise if this has already been discussed and I've missed it; but just in case it hasn't:
Say you've been playing with a group, or have already began a game with them - then someone comes along who wants to join in. Should their base Obligation be the same as what the others had, or should it vary?
For example, I am about to run my own online EOTE game (play-by-post), and presently have five players (with a current Group Obligation of 65); I'm also receiving a few requests from others to join when I have an opening, and a sheet from a friend of mine who's keen to join either before the game kicks off, or just after it has.
I don't want to fiddle with Group Obligation if I can help it - the totals everyone has fits with their backgrounds - and so need to figure out what level of Obligation the new players should take on (if they're added at all). Would it also be 10, with the chance to increase it by a further +10? Does this make for a natural limit to the number of players you can reasonably have?