Fine! Now exchange and side chain.
They promised to add a token to the list of exchanges before the New Year?
They said that it would be so. Negotiations with the exchanges are underway.
Is DEC token only needed to create a node? Are there any other uses?
DEC Token is primarily used to emit inter-platform currency by the node, yes. But regular users may also hold DEC and exchange it into inter-platform currency; or they may sell it on the exchanges.
As the platform grows and the number of business participants increases, there may well be additional services for DEC holders in the future.