Facebook's reaction to ICO advertising is because the US regulators mentioned they were looking into ICO's and Facebook wants to stay ahead of the game. (After they got caught allowing illegal Russian adverts in the US election, Facebook doesn't want to be associated with other potentially illegal activity). It has nothing to do with Litecoin.
You also had some ICOs that were scams advertising on facebook and on google ads. By banning them they just go the safer route which is great. I mean even if legit advertisments were thrown around ICO, we all know how huge impact fb advertising has when it comes to ordinary people who can't think for themsels, imagine them reading an add and investing into some ICO at end without even knowing what they are doing, because an add offered an extrodinary return or something. They might however enable them again in future, but if this happens this will be with higher regulation.
There are bitcoin related ads on fb now, but seems no ICO ones.
