Series of tokens have been developed and some are still in the ICO. Those that have been completed and listed on exchange are really suffering a big blow in term of loss of value in the exchanges. The new ones are scared of being listed on exchange at the moment because of the market situations at the moment and the effects it could possibly have on their tokens' value.
I dont think that's a deliberate act. ICO project owners must anticipate the level of risk, because they are working in a market that is constantly changing. If the project owners could not calculate the average level of fluctuation during the token sale, they were bad managers.