you are touching on the most important point of the discussion , facebook might not be allowed to roll out a permission less ledger due to its US base , however telegram might roll out a completely decentralised permission less coin as they are rolling ICO from switzerland / dubai, so lets wait for more updates from them
Maybe they will. Maybe they won't. Maybe they will produce a buggy centralized expensive failure. Nobody really knows at this point.
Maybe we should refrain from posting click baity FUD posts like, "Is it game over for other cryptos?" implying it's game over for Dash. Let's at least wait and see what it looks like in real life before we yell the sky is falling based on pure speculation.