Let me expand on that last post.
It is correct that more people will in fact see a $50.00 ad vs. a $5.00 ad organically from the paid spots appearing on Facebook newsfeeds, but appearances of the same ad posting appearing on other newsfeeds as a result of people liking, sharing, commenting, etc. do not result in additional charges or cause your ad by to be wiped out by those views from the others doing that.
Eliminate ‘sharing” and your ad doesn’t trend the same.
And angry isn’t a positive response to an ad.