Seeing Facebook ban ICO ads does not come as a surprise. While many may see this as a move against cryptocurrencies, it may not be.
I am of the opinion that many of the ICO advertisements that I see on Facebook are relatively spammy. I can't imagine that Facebook would ban these ads for no reason, as they know how big the cryptocurrency community is, so I can't imagine that they did that.
That being said, it should spark more people to want to invest in ICOs, due to barrier psychology. Either way, I am not phased by it - I have never found a great ICO through Facebook ads, I rely on my own research!