my wallet has 62 peer connections. double check your firewall. All I put in my BitcoinDark.conf is:
addnode=ps00.bitcoindark.ca
addnode=ps01.bitcoindark.ca
addnode=ps02.bitcoindark.ca
addnode=ps03.bitcoindark.ca
addnode=ps04.bitcoindark.ca
addnode=ps05.bitcoindark.ca
addnode=ps06.bitcoindark.ca
addnode=ps07.bitcoindark.ca
addnode=ps08.bitcoindark.ca
addnode=ps09.bitcoindark.ca
This worked. The link in the OP should be updated.