Anti-Tanking Measures:
2) 4 teams that relegate pay the 1 team that advances the cash for advancing.
So a team that tanks all season, but does just enough to finish seventh and then buys ringers for a couple of weeks to win a relegation series is not hurt in the least, while a competitive team that they knock out is given the double whammy. Not good.
If you want to punish tanking, you need to punish teams that put out weak lineups for league games. If you lose a game with a lineup that's dramatically below league standards, your attendance and merchandise should take a serious hit for several weeks - why should the fans pay good money to go see a game if they're worried you're going to play a bunch of scrubs and lose by 80?
The solution to people not trying because it's profitable is to make it unprofitable to not try.