Read more here: Prohibit Cryptocurrency Ads
Along with Google, Facebook and Twitter, snapchat also joined the party. Few days later, we will see instagram to do the same. Mainly we will see a majority of the USA based companies will ban cryptocurrency advertising. The reason is not what we think.
One of my fellow community members has pointed out a genuine reason behind these bans. These companies are not bothered about our security of funds. Instead they are probably receiving pressure from US government to ban it so that the growth of cryptocurrency can be seized to the minimum level. Being an US company, they have no choice but to comply.