From Swanni's article:
Washington, D.C. (July 3, 2012) -
"The National Football League this season is changing its TV blackout rule, which should dramatically reduce the number of games blacked out due to insufficient home attendance.
Under the old rule, the home team could decide that its game would not be broadcast locally unless the game was a 100 percent sellout." ...
NFL Modifies TV Blackout Rule
Considering the current state of the economy and the high cost of stadium seating, I bet thousands will appreciate this rethinking and television advertisers will reach more audiences.
On the other hand ... if stadium ticket prices were lowered, more people would attend the games thus filling the stadiums and those people would buy hotdogs, burgers and beer: the stadium revenue would actually increase and the prior blackout rules could continue.