My immediate thought when I saw this was "Fancy scam mixed with PR bomb", a little digging surfaced these:
https://blogs.harvard.edu/doc/2019/02/27/spinner/
https://www.prexamples.com/2018/07/frustrated-husbands-can-u...
https://blogs.harvard.edu/doc/2019/02/27/spinner/
https://www.prexamples.com/2018/07/frustrated-husbands-can-u...
The less understandable part is that it's charging $50 for 180 impressions such as https://twitter.com/RichLeighPR/status/1037066048485371905 while Facebook sells those directly for a few dollars per 1000, i.e. 100x markup.
Facebook does not allow you to build a custom audience of 1 person. I believe it has to be a minimum size of 100 or thereabout. Which means when Spinner says your target will get 180 impressions, they have to throw in 99 random non-targets into the targeted audience in order to get the placement. Thus they really aren't marking it up as much as you think.