Consider this: What makes the guy at OKCupid any different from Sen. Joe McCarthy?
The coercive power of the state for a start. And, of course, the fact pointed out by GP, that OKC is merely making a recommendation, which is, your purple wig example notwithstanding, is a "demand" more easily ignored than a summons from the House. I mean, get real dude!
That being said, to urge a boycott of a company (which has, in light of this controversy, publicly stated support for marriage equality) on the basis of a $1,000 donation made by a CEO appointed some 5 years after said donation (which donation was, in any case, a perfectly legitimate expression of that individual's personal convictions) seems unduly zealous to me. Especially when far more compelling reasons could be given for boycotting nearly each and every substitute product.
Of course if LGBT issues outrank one's other concerns, such zealotry is equally a perfectly legitimate expression of personal conviction. I however, as a truly caring and compassionate human being (and as a sociopath that requires some effort let me tell you!), shall continue to use Firefox.