Out of curiosity, the Clevermining states the following:
We automatically exchange all mined coins into Bitcoins and pay out entirely in Bitcoins for your convenience.This is the Clevermining's Guldencoin deposit wallet on Bittrex:
https://explorer.guldencoin.com/#/address/GQsUGhJiKTA35ysmVDMsASHPdXWxbDoqoNAt this moment over 3.7 million Guldencoins aren't sold, all those Guldencoins are mined with the help of your users but didn't reach the Bittrex exchange. Clevermining is stacking up, can you justify this toward your users?
So is the problem that CM is dumping the coins or holding the coins?
If that is really a Bittrex deposit address, you can't possibly know if the coins are sold or not. Exchange trades are off-chain and deposit addresses belong to the exchange, not to the user. So CM could be holding 44 million NLG or zero or anything in between.