Guys, Demion version is working as advertised by him - very good soft, no problems.
However it works only with claymore 10.0 - in newer version claymore have made some detection, so basically you still get shares from devfee, but mining is slower as with -nofee option..
So use ver. 10.0 and Demion soft - and you will be fine.
I can confirm it also works as advertised. On Ethermine I get a second miner (with name "default") giving me ~2% shares, which are the redirected dev fees.
Does anyone know if this will work with Claymore's Monero/CryptoNight miner, or what one would have to do to run it with that miner?