I set it up exactly like their guide says (spent like 1 hour on Photoshop adding the Play Store badge and making it look nice for about 20 images).
I tried it with $50 and setup shoutouts with 3 IG accounts. I gained 1 follower from one of them, none from the second (and the guy wrote on his the shoutout “sorry guys but I need to make some money, please don’t unfollow”, and the third was super suspicious for the following reasons: 1. Posted my shoutout immediately 2. Within 5 minutes I gained 100 followers and then nothing after that 3. 0 activity from the followers.
Maybe it’s different for the higher cost shoutouts but my experience was bad and the service was absolutely useless for me. I think the IG images with badge idea has potential so I’m going to try setting up boostgram so that my account likes and follows Android related accounts. Let me know if anyone is interested in the results.