My only thought is that it's really not a long-term strategy.
Let's say you buy one of these players a week at, let's say, $50,000 (not exact, but it's somewhere in the ballpark). A rundown of the way I see it...
-As a Division I team, I can't imagine doing this. The players who sell for that, while maybe high salaried, are often not well-rounded, and as such aren't going to be difference makers at the top level. To me, it's not worth giving away $500k+ a season (~10 weeks x $50,000) in one-time auction fees for players that I won't be able to use for more than two games. The economic margin at the top is too thin for this to be a viable strategy.
-As a lower division team (say V-VI), that $50,000 a week is much better invested long term in building up your arena. If you have that money, you either ought to be saving it or investing it in guys that can help you climb the ladder, not short-term, 1-2 game fixes. I think you probably agree with me on this one.
-The mid-division teams, Div II-IV, is where I'd imagine the strategy would really get kicked around. Obviously the goal in this case is promotion. I'd imagine the team would fall into two camps here- either they're good enough to be promoted without having to bring in that ringer, in which case why waste the money, or they're not, and they need the extra boost to promote. The problem in this case is that if the team needs that $200k player to promote, they're likely not ready to promote- assuming you buy a C- this means your PG, SG, SF, PF aren't good enough to beat the other teams, and if they can't do that at level IV, they'll get killed at level III, regardless of whether the team keeps buying that $200K player even after promotion. Also, there's really no way to use the $200k guy in the playoffs, so you'd essentially have to bank on a 22-0 season, and assume that's enough to get a promotion.
-As a 1-week fix for a big Cup game, or for TV/rivalry games I'd imagine there's some draw, but often it's one of those "is it really worth it" scenarios. Up until the last 4 or so rounds of the cup, the payoff is only $50k to win, which means you're essentially spending $50k to try and get it back in a game. There would be the fan survey boost, but again, it wouldn't be a long-term benefit from only a few games.
I suspect there's some rambling there. Hopefully some of that makes sense.