I never received any response... at least by email anyway. I did notice one of them visited my site. Still, I just assumed they were not interested.
Well today I received an email from all three of them (I'm on their mailing lists) promoting a new plugin that does exactly what mine does. Not only that, but the one that visited my site is using a webpage that has almost cut and paste text of my sales page.
I realize this happens, but I find it both frustrating and disappointing that I reached out to try and build a relationship and this is what happens.
I guess it's time to update my WSO and add MRR at a lower price. There is no way I'm going to compete with the reach they have.