Questions regarding leagues.

1. If Promotion/Relegation is enabled in a league with 32 Rookie teams, when the top 8 get promoted to Pro after first season, does that mean that another 8 can enter as Rookies (for a total of 40 teams; 32 Rookie and 8 Pro)?

2. Is there any penalty for leaving a league after its season has ended and joining another league yet to start its season?

3. Is it possible to close a league (basically, release its teams so they can join new leagues without penalty)? If so, can this only be done post-season, or at any time?

1) yes, exactly
2) yes, I believe there is a financial penalty and something with the design of your new parts
3) I believe there is an option for a league host to "Close a populated league", not sure what the side effects are though

This is true even out of season? I ask because I'm in a private league that just started up for members of a message board, and the first league filled up so fast that some people who wanted in couldn't join because it was full. I want to know if there's any point at which members of the second league (which was started so everyone who wanted to play could play) will be able to join the first league without being penalized.

If you leave in the off-season there is no punishment, so anytime inbetween the last race finishing and the 1st race of the new season

Excellent, just what I was hoping. René, David, I salute you.