I was very curious about this and looked into it extensively during
the period when TSR was shut down. As best I could find out the various
boycotts (there were several unrelated ones) affected the company as a
whole not to any great degree. Individual products and lines are of course
another matter; several lines were imo affected and they fall into three
broad categories; already weak (OA,DragonLance), poor products (GreyHawk,
Mystara) or new concepts (Spelljammer,Birthright). You reap what you sow.

L8R