The New York Times has a profile of Bob Page of Replacements Limited and the consequences of opposing the constitutional amendment that bans same-sex marriage and civil unions.
The company lost customers. The article suggests that's why Fortune 500 businesses headquartered in North Carolina did not get involved, even though a few executives said they personally opposed the amendment.
The amendment passed in a landslide, and is now part of the state constitution.
Business support was critical to the New York legislature legalizing same-sex marriage. The article says that big-name businesses based in Washington State are publicly opposed to an effort to repeal its new law allowing same-sex marriage.