I think many times in a league, screening a potential owner is necessary. For example, in some of the longer running leagues (and even in some newer ones), there are teams that have gone through so much owner turnover, that they are consistently in the bottom of the rankings. I feel you really need to do a little extra work to find someone willing to come into a "rebuild" project, and screening a potential owner's past OOTP experience and leagues is a very good start. If someone has a proven track record of sticking with a team through thick and thin, I believe that says a lot about what they'll bring to a league. Unless I know the person from another league I'm in, I always take a look at their experience and past leagues to get a better idea about them. I've even asked their previous commish's about them and used that info with anything else I have available to make a decision. I'ld rather take the time and get someone who's going to stay on rather than just say "yes: to everyone applying and see them drop out after a season because they can't "win now".
I've taken over the full time commish position in the
SSBL (cheap plug!), and we are a season away from our 25th as a league. A little screening of new ownership just might allow us another 25 seasons of OOTP enjoyment.