I prefer if they put the ".info". It would be easier for the people to get there than by typing "blockchain" on google. Some people might not even get it and just quit looking after a minute or 2. It is better for regular people to make it straight forward as possible.
We have also seen some spoof sites with the same name or something close, which is used to trick people into going to a hackers page. Blockchain.io or Blockchian.info etc. So yes, I would also prefer them showing the whole name. Still a good Ad, and something positive for the community to use as a training tools. ^smile^