It's not a question what did they send but why. Is it just more automated marketing bullshit that is trying to guess what people might like and revomend shit to people? At least the post suggests that.
The whole notion on tracking people interests to promote shit should be banned in the first place IMHO. It only leads to promote shit while filling greedy people pockets.
Recommendations should always be personal like if you Like/subscibe to person X then it could suggest stuff that X thinks if should recommend and it should clearly say "X recommends:" so you know who recommends what, both that you can stop follow people that sold themselfs to highest bidder or have interests not alight with you.
Having automated magic recommendations is always a recipe for disaster (example above) and abuse by the algorithm owner.
Hence the issue we should target and fight is the closed/secret algorithm not only focus on the "Nazi incident". But almost non is talking about it.