Twitter is to ban most advertising of cryptocurrencies on its platform, joining Facebook and Google in a clampdown on the nascent industry, the company said in a statement. The San Francisco-based firm will this week launch a policy that prohibits advertising of initial coin offerings (ICOs), a form of ... from Google Alert - cryptocurrency https://ift.tt/2pHDLle via IFTTT https://ift.tt/eA8V8J