@trochee @Catvalente I know, I am disagreeing. It is a distraction. The betterment of LGBT rights in the US wasn't because of corporations or marketing firms. It was because activists have worked concertedly on it for decades.
The key thing is corporate pride started in earnest after the Supreme Court decision to allow gay marriage. When it was safe to support LGBT causes companies started doing it.
Companies are not LGBT allies. If they could make money being anti-LGBT they would.