Ask HN: Do sponsored posts on Facebook deliver value?

I decided to test Facebook sponsorship with a post including my Christmas card. I paid $8.80, which after about two weeks corresponded to 5 likes and 5 user comments (since I just had another unsponsored post with 13 likes I didn't immediately perceive this as value, and wondered if people deliberately didn't like it because they saw it was a sponsored post).

Anyways, about a month later I get message from Facebook claiming to reveal the results. I get the following two pieces of information from them: "Your post has had 3.3x as many views because you promoted it." and a weird bar graph that shows regular views at "30%" and paid views at "70%" (30% and 70% of what I have no idea).

To conclude, is there any value here? I think the sponsored post discouraged people from liking it early, and I believe that the time in the news feed also correlates to the number of people that like it. Consequently, a post liked by many people will probably be in the news feed for more than 3.3x as long, and get even more views than a sponsored post.

The conclusion would be to only sponsor posts that few people will like. At least that's my logic. Anyone else have a similar experience?