I have come across a couple of programs that do ask you to email for registration, it is a little off-putting but I suppose if you look at it the other way, they are actually doing a good thing.

By doing this they are filtering out all of the illegitimate sites and the ones that steal content, making sure that they are promoted by good, reputable sites... to me that suggests that they are very caring about their business and would expect any content mailers and/or dealings with them should be of a high standard.

Although I wouldn't wait more than a couple of days for someone to come back...