I have an idea to make this work...We are all here to grow our followings on social networks so why not launch 5 member joint-giveaways on rafflecopter or another form?
This way up to 5 people looking to grow their followings can add 3 social networks each to grow and also contribute money towards a prize. A $25 Gift Card should do well. This will allow people can grow their fan-base and those participating can win a prize. This will also allow people outside of this site to follow you.
If you are interested in this idea leave a comment below.