Since Bitcointalk didn't ban altcoins, ICOs and all other money-grabbing-schemes after that, I don't think it should ban other promotional activities either. Banning doesn't fit the forum's mission "to be as free as possible".
Banning forums would make it a thin line to banning other websites.
Bitcointalk has tens of millions of spam links to Facebook and Twitter. None of those are banned.

I don't get it: Bitcointalk offers more freedom than any other forum I know. Why would you want to reduce this freedom? People both online and IRL seem hell bent on getting more and more regulation, without realizing you'll never get back the freedom you once had.

I'm glad Bitcointalk is far above that level. Let's keep it that way.