the dev team reserve 25% of the coins according to the ico plan, what are they used for
That is reserved for dev team. Almost all the ICO projects have that part. That is the reward for the hard working of the dev team.
The development team to retain a majority, they work so hard what this is for them to continue their efforts to the development of large chips, you can play this young model is a great motivator.
So why not list on large exchange as they work so hard for more than one year time, i think there must be some problems with the dev team