If it's on the market.. than i think they are interested in selling them. They see that dev team is working hard & are leaving them there because they know that someone eventually will buy them.
Lets say trader X has 500 million Espers. He puts 100 Million at 1 sat to have some btc to trade on yobit. 100 Million = 1 btc.
Keeps 400 million for when Espers go to 100 sat = 400 btc.

=Þ