Has poloniex refused to list WAVES?
Yes
source?
It is not public or any source I've seen they have refused to list waves. But it is obvious or they would have already listed waves by now. Sasha is pur dirt and by doing what he has done here will come back to bite him hard.
It would be a mistake to list Waves without a fully running blockchain and the full nodes. It is the right decision by the development team. Security must be always first in the agenda.