When there are limits people wants to buy more. Then to sell tokens afer ICO for a good price. A good business. Some people buy tokens only to resell them later for speculations.
Now a very difficult situation on the market. Many projects are even cheaper after the commencement of trade.
This is true. But now there is anoter situation. I have red statictics that 84% of all money collected on ICO was collected by ventures investors on closed Pre-sale. Remember the situation with ICO Telegram. ICO becomes only for ventured investors.