should i use hcn address or sumo address to mine in the donation pool??
You can't use addresses of 'foreign' coins on a mining pool. It should give you a warning when you try with a HCN address on a Sumokoin pool. So you should use a private Sumo address. Please, do not use exchange addresses.
I was mining two days for this donation.
Now there are no miners working on
https://donation.humanitarycoin.org/On the other hand, when I access this URL, there is a CoinMiner that wants to use my CPU to mine. I think, if it's a serious site, that should not exist.