I'd love to get your feedback on the site / concept:
https://shoutoutpost.com/
So basically how it works is, you create a free account and import any Instagram and / or Twitter accounts that you have. It will automatically show you all users within a 20% range of yours that you can sort by category if you wish. You can then request a trade with those users for a shoutout. It will then prompt you for your shoutout text/image to send to the other user. That user will be notified by text/email that there is an incoming request and can then respond in the same fashion. At the end you will rate each other to complete the trade.
Let me know what ya think