I am not familiar with blogging or this sphere at all, but it's so funny to me that I was assuming the website said that the program would PAY the bloggers to be there for a month (including housing) and not the other way around.
I assumed this was one of those "We'll let you write a book while riding Amtrak for free" sort of thing. Not sure why I thought that, but it made me laugh after reading your comment.