I really like the idea behind Instaaa - promoting your startup at the beginning is always tough and it's awesome to have a quick way to submit to a bunch of directories without the manual labor (and for a good price). I saw some reviews about the directories not being the best, but the list was updated recently with high quality sites. Excited to try it out!
I am not comfortable with the communication / marketing strategy adopted and thus would not recommend it. My ideal service would have price and rewards listed upfront and the list of submission directories would be checkable and of guaranteed quality.