Have you been talking to Rick Santorum? You seem to think that the mere existence of gay marriage will mean that no one will any longer desire a hetero marriage. Because when DOMA was struck down the other day, untold millions of formerly straight people smacked their foreheads, exclaimed "I could've had a V8!", and ran out to find a same-sex partner -- and now, no more American babies, right?
It's been years since I used Pandora, but at the time they were already doing this. A fixed number of specific songs would appear in my playlist ever hour, not allowing me to skip them because of some licensing agreement. This is why I ultimately abandoned it, but like you, nearly every artist whose music I've bought in the last 8 years is someone I found on Pandora.
Godwin's law applies especially to inappropriate, inordinate, or hyperbolic comparisons of other situations (or one's opponent) with Nazis – often referred to as "playing the Hitler card". The law and its corollaries would not apply to discussions covering known mainstays of Nazi Germany such as genocide, eugenics, or racial superiority, nor, more debatably, to a discussion of other totalitarian regimes or ideologies, if that was the explicit topic of conversation, since a Nazi comparison in those circumstances may be appropriate, in effect committing the fallacist's fallacy.