Hmm...well, I have a Christmas story out with them right now and as far as I know, which I certainly could be wrong, the story every day was for their 25 days of Christmas.
I didn't receive the email, obviously since I already have a book out with them, and don't really know anything about it, but I can say from what I have seen their sales are not terrible. I do write m/m and am not a newbie (and make quite a bit from my sales at all my other publishers) and the reason I went there was because I happen to have Christmas story idea that fit, but their stories, at least m/m, are consistently top sellers at All Romance Ebooks and Amazon for those genres.
I haven't gotten any royalties yet and don't think I will probably submit anything else there, mostly because I'm happy where I am for other publishers.
I do agree the email spams are rather bizarre.