SB is very new, so this probably hasn't come up yet, but do you have ideas for player exit strategies? If so, what are they?

One of the things about setting this up as a game is that it makes self-improvement fun. This fun-ness is removed if a player is tied in, either by a feeling of responsibility to allies, or just by a design quirk that assumes that there will always be another hill to climb.

That way lies problematic use because superbetter has become an obligation/job rather than fun. It becomes a demotivational spiral that the player is trapped in because they have obligations, either to their allies or to justify time already spent, to continue climbing an unclimbable mountain. Then you have people trying to get superbetter from superbetter.

Personally, I have identified a string of nested goals, but there is an end point, at which time I would like to "win," and end the game. If I can "win," I am more likely to come back and play again later, instead of eventually just dropping out. In the latter circumstance, I am likely to feel too guilty for bailing on my allies to pick the game back up when I need to.

In a "win" situation, I would need to be able to choose whether I am going to continue to support my allies, respectfully bow out and say goodbye or find a replacement for myself in their ally structure. This would take into account that my 'win' probably won't happen at the same time as theirs, and will allow me to leave without hurting anyone else.

You guys are game designers, so probably have more/better ideas about how to achieve this than I do.