OK, so you are offering Facebook Spamming service. So Exactly how many posts are you going to send in a week?
You are going to spam it everyday and send in batches or it is one time action only deal?
And lastly - you are creating your own posts or I can tell you exactly what I want you to send?
great question.
Its not really spamming. I will vary the content, and we can rotate over posts and pages. You can either let me write what i want to help you to target your users, or you can give me what to send. Sending it all at once would not be useful, as a result, i would post everyday. Its like you were advertising as a legitimate facebook advertisers.
As for promoting your own page, similar tactic, but id also like and follow other pages and message owners for shoutouts.