I think people sell their coins on POLO because these are stacked there ; finally nobody knows why W/D service is disabled? POLO admins said that the wallet is in maintenance and they don't know how long will be like that; is the POLO act or there are other reasons?
I've already submitted a ticket to polo, explaining to them exactly how to fix their issues... and showing them the new nodes that I've put online... (and there are more coming.) So I'm not sure what their current 'issue' is, though I'm certainly going to be putting in another ticket about it...