You're spot on, which is why I've always had a bit of a grudge with using facebook for business. Edgerank is super hard to beat consistently and I don't get why I should pay to reach all my followers when they've liked me and opted in to receive my content (if you pay for a promoted post, you will reach all of your followers). It also makes paying for likes via facebook less worthwhile.
That being said, it's a problem that needs to be solved on the marketer's front. Facebook is in the business of delivering the type of content it's users want in its feed. They want people to stay on their website and be engaged (like/share/comment).
You always see the posts that have broad appeal (buzzfeed, distractify) getting lots of visibility. Also the youtube videos or commercials that have broad appeal to a demographic like the dove commercials (
http://www.youtube.com/watch?v=XpaOjMXyJGk) (women).
Essentially, to beat edgerank, you need to create content that 1. People want to share or 2. People want to receive and interact with (aiming for engagement over breadth).
You can have 200 facebook followers and 50 percent of them will view your posts (100) because they are super engaged, or 1,000 and only 20-50 receive your post in their feed because they have not been engaged in the past. The more you can drive people to engage with your content via your page, the more likely they will receive your content in the future.
I wrote a bit about creating sharable content here:
http://www.crowdcrux.com/viral-marketin ... h-peretti/Other useful articles:
http://www.reviewzntips.com/how-to-beat ... algorithm/http://www.jonloomer.com/2013/04/10/bea ... ted-posts/"You can’t do much about Decay. You post something, it gets older every minute and loses strength within EdgeRank.
Additionally, you can play around with Weighting by adding images and video, but to a certain extent there is only so much you can do.
But we can rig Affinity. We can make sure that our fans have a high Affinity for our page so that even when we’re not posting pictures of cute kids and pets our posts are being seen." - (From the one article above)
I'll think about your second question (when to boost posts) and get back to you. The simple answer is you should have a good idea of the ROI before sinking the money in.