Yeah, I bet it would be easy as hell to make a simple appa script to do blingo daily. I bet I can be done in under 100 lines, it's really simple and I'm pretty sure appa has all of the necessary functions for it. If you really want to you should go for it, go check out the appa thread there is a function list there!
But yeah blingo for sure is legit and easy to do, not sure if I just got lucky with my mini prizes but hey, why not just run a blingo script daily for a few minutes and try your luck!