WIP Challenge "Seats"

[rootelement]

We need to add the ability to limit the number of people who can register for a challenge.

Add challenge.seats - If it doesn't exist, or it's set to 0, it's unlimited.

On the challenge registration, when a user registers, make sure there's a seat available.

Questions

1. What prevents someone from registering for a challenge, taking a seat, and not doing the work?
2. Would we use the for public challenges? Or just private/group challenges?
3. Should we add registration requirements somehow? Base rating?

[cwdcwd]

1. We have that problem with open reg today with non submission but obviously squatting here would be an issue. I'd hate to introduce checkpoints and complicate things but how about a negative incentive. Squatting without a valid submission dings the member somehow or blocks them from later registrations.
2. I think all, myself
3. Do you mean limit reg to a filter on member traits of some kind? It's a good idea but prolly too complex for first iteration of this