Hi everyone.
I'm the Fanchimp founder. I would be happy to reply to all the questions and solve any doubt that you have.
In general, Heather Roper, you will not bother your followers if you publish 4-5 messages a day, where 4 of them are interesting news and just one is a product you're promoting.
With Fanchimp this happens automatically, so you'll not spam your fans. And, if you still want to share less messages a day, you can. We've a setting where you choose how many updates per day, you want to share.
Let me know if I can help you further.
Claudio