Sony is paying out the ass because they sold so many PS2's and PS1's with the patent design. Immersion is now taking a chunk out of every PS2 sold at a premium.
Without jumping the gun on
when the patent was filed and
when it was accepted, the fact is Sony was using someone else's idea. There are a lot of ways to do "rumble". This is similar to how Nintendo patented the Cross shaped D-Pad. While all these patents may be stupid, ALL these companies use them because it is the law and the only way to protect your ideas and products. I am sure Sony would not be to happy if someone used one of their patents, and I am sure they would sue.
If Sony used another companies idea then they should pay--and even more than it would have cost to license it. The 90M number seems huge, but you are talking about 80M plus controllers with this technology PLUS probably another
extra 40M-120M Sony brand PS2 controllers (every console I have owned since the N64 has 4 controllers... almost all are 1st party). Considering these controllers are sold from between $20-$25, Immersion getting $1 a controller is not outrageous.
I think this is a pretty cheap penalty, and I am sure the fact Sony decided to take the court route instead of licensing the tech did not help costs. It costs a lot of money to go to court, especially against a mega corperation like Sony.
I think before we jump to too many conslusions it would be nice to have more info on the case--which may be hard because I am sure there will be continued litigation and other parties like MS have settled outside of court and would be best of not saying anything. I do find it interesting that companies like Logitech and Madcatz did license their tech though. I think that says a lot.