Scammers still active
0x92fbf673935c28296e33170C1F70A33d95cDA6DC
https://s3-us-west-2.amazonaws.com/give-crypto/ethereum20.html?323601
and
https://ethereumdev.medium.com/
same address reported as beeing a stake pools for those having less than 32 eth

After both XMR and XDN anti-ASICs forks, merge mining feature has be recovered by a pool https://xmr.minercountry.com/.
No limits or special arrangment for your miners are required; only is required to use your pub key XDN as password to be payed.
Mind Minergate and Freewallet had not forked XDN blockchain to rel 5  yet, so you'd better use official GUI XDN wallet where you own bot pub and secret key.