I read your report and logged in there.
To sale the acquired tokens is not yet possible.
In Q2 2018 it should be possible, but aren´t we there?
I tried it (10.04.2018) and it came the answer in a pop-up window:
Token withdrawals are not currently available.
Redemptions are scheduled to be activated in Q2 of 2018, pending the implementation of additional fraud prevention mechanisms.
We will notify all members via email when this is possible.
Yea i read that too for Q2 of when they may allow tokens to be moved to different wallets. At time being, they need to make sure that the searches people make are valid though ... cause there could be people just simply entering in random searches for the sake of getting PRE tokens.