Ya unfortunately some people will do that just to see activity from the team as many seem to find comfort with their investment (or making one) seeing an active and responsive team.  See many posts on Facebook going unanswered as well, it is the public response and timing of those responses I think many people look at before investing into something like this, really needs to be somebody responsible for staying on top of this and shining in the public's eye.

Hopefully they'll get this gap filled shortly, am sure with the success this is seeing and the pace it is seeing it at we are looking at great times ahead with this one!

How price can go up if everyone holds? There are no coins generated after ICO is over.

Everybody will not hold the coin and few people will sell the coin when the price of coin increases. Only people who invest for long term will hold the coin in order to make more profit.