A boycott against T-Mobile for supporting gay marriage is being countered with a “thank you” campaign.

Last month, T-Mobile announced it would back Referendum 74, the Washington state ballot measure which if approved would uphold a gay marriage law enacted by lawmakers, and gave $25,000 to Washington United for Marriage, the campaign to approve the measure.

“Our support of this issue is a reflection of our culture, how we do business, and our belief in the fair and equitable treatment of all employees,” Jim Alling, interim CEO of T-Mobile USA, said in a statement.

The National Organization for Marriage (NOM), the nation's most vociferous opponent of gay marriage, last week responded to T-Mobile's announcement with a petition on ActRight.com in opposition.

“Join us in signing this petition to let T-Mobile know that not everyone supports their efforts as a public telecom company to redefine marriage and tell our society that moms and dads are interchangeable,” the petition states. “After signing this petition, for those of you who utilize T-Mobile services, consider canceling your contract and transferring to a different provider.”

On Thursday, Washington United for Marriage launched a campaign to thank T-Mobile for its support.

“Sign our thank you card today, and let them know we've got their back,” the petition states.

NOM has previously targeted Starbucks and General Mills for their support of marriage equality.