Because it's not about the $1000 (and you didn't honestly think it was.)
With your prescription of discriminated against minorities offsetting the donations of bigots to parties who would fortify or extend that discrimination, gay people would also have to worry about bankruptcy. There's at least 5 bigots for each gay person.
It's only a matter of time. Maybe universal gay marriage will not be achieved in my lifetime but it will be achieved. If people have power to bring it closer with their efforts or monetary contributions - they are welcome to do so, but it is still quite inevitable. This topic might hold relevance and controversy for now, but ultimately - it is not. Just another footnote in history.
With your prescription of discriminated against minorities offsetting the donations of bigots to parties who would fortify or extend that discrimination, gay people would also have to worry about bankruptcy. There's at least 5 bigots for each gay person.