If the exchange operators are smart they will add it and then tell the media they are ready for a fight.
Sure, no such thing as bad publicity...besides with the logo change, Kayne's legal argument becomes super-thin at best since it is now clearly a parody. The old logo, not so much. I'd be willing to bet that Comedy Central might even have better grounds for an infringement case at this point.
Overall dumb move by Kayne. Legal threats won't stop this, it'll only draw attention to it. God forbid someone from Kayne's team actually try and reach out to the developers to work out a mutually beneficial arrangement. Kayne could have at least endorsed it, and why not? He raps about money and bling (I'm guessing), so how much cooler could it be to have an actual payment system in his name, giving him all that free publicity?
The old logo was actually flattering to Kayne. Now he's stuck with the GayFish logo.