Although I admire your cavalier approach, unfortunately the numbers do not confirm the hypothesis of your opinion. Let's use your numbers in a hypothetical situation....
There are -- conservatively -- 250,000 fantasy leagues currently being administered by fantasy football services on the Internet (CBS Sportsline runs at least 100,000 leagues themselves, and they are not even the largest provider.)
Right now, CBS hauls in about $13M in gross revenues from the sale of their commissioner service alone (we are not even including ad revenues from their site.) Let's say that CBS wins the "right" to be the sole fantasy commissioner service for the NFL. As a result, CBS ups their price to $500 per league. This causes 35% of the leagues to fold or go on their own (the high end of your estimate), meaning there are now only 162,500 fantasy leagues willing to pay the $500 per league to the only service out there -- CBS.
Well, 162,500 * $500 = $81,250,000. CBS (or any other big-time company) would be more than happy to pay $10M for the right to be the sole fantasy provider. And that does not even include the prices they could command from advertisers to be on the site which is viewed by 162,000 league members.
The NFLPA gets $10M per year, CBS makes out like bandits, and you lose. Sure, maybe some people might not view as many games, but I doubt this would make a dent in the multi-billion dollar TV contracts which currently exist.
It is all about cornering the market. There is a reason why the NFLPA is going after this so aggressively. They know what they are doing.
Thoes Mother F------ Bast----