Yes seems to work out great for some, if you dont get kept on with an airline, you just pay for another 500 hours, seems like a great career choice.
Facts are, some companies only hire low hour FO's because they do NOT want experienced FO's with rating, it is a part of the companies business profile.
Then the companies who hire experienced FO's seem to have more than enough high hour experienced crews to pick from. So for me it seems if you do these P2F schemes, you might end up in the middle of nothing!
Where is the logic, why should a company start paying you to keep you on, when they can get the next idiot in the que ready to pay to get your space! Seems some pilots can't even see logic, I think those 14 ATPL exams does do something to dumbify their brain!