instead of relying on my poor editorial capabilities, just see for yourselves.
it has been a major news story both on an american populist radio station, and a rather serious german radio.
of course those are only my sources; i bet the news coverage is huge, but i mention this because these are rather opposite content providers, and if they both cover it extensively & critically, that means something in itself.
this is only the tip of the iceberg.
or wrong, the whole story is about revealing what hides underneath the tip of this particular iceberg.
so, this is only one of many icebergs of which we only see the tip.
what i remember from the report i heard:
companies like these (i don't belive that lancing this particular boil is the end of the story) influenced the outcomes of various elections.
read up on the techniques on the wikipedia article or elsewhere - that in itself is quite mindboggling and repulsive. and it isn't even illegal per se.
facebook knew about this. but now that someone blew the whistle, they're acting all surprised and disgusted.
etc. - don't take my word for it, go read/listen if you haven't already.