is a good idea. 3 issues of a title for $3. Just enough (the perfect amount really) to see if you are into a book or not. We always talk about the "three issue try-out" in deciding if a book is going to stay on our pull or not and this is a great, cheap way to see if a certain title is for you.
I really like this and hope it works and more companies jump on, like they are doing with the $1 first issues that was started by ... I forgot ... Dark Horse? Or Image or DC? I don't remember. Anyway, I hope this is the new norm as three issues really is the perfect amount.
I didn't even really get into Weirdworld into issue #3 nor Scarlet Witch until the second issue so yeah, three issues is the best test you can have.