There's no reason to believe the other 22 owners would join other worlds. So, if they do that, WifS has screwed themselves out of $500+. No reason to do that.
I'd NEVER accept this into one of my worlds but if WifS wanted to get creative, they could work on allowing owners to carry a 40 man roster with them to worlds that would accept them. IOW, I could carry my 40 man from my "sitting for 3 months" world to another world that "just needs two". The rest of the team would have to be randomly generated(and the strength would be determined by the strength of that 40 man roster). An owner would get to keep his team but, if he wanted to carry his 2nd year prospect, he'd have to add him to the 40. This would prevent ridiculous, traveling powerhouses and would allow some worlds to fill.
I think some worlds would accept this and it would be a viable option for the worlds I previously described. These owners would likely replace ransacked franchises. Maybe WifS could even charge a $15 transfer fee in addition to the team purchase.