Harvesting Doesn't Generate Rewards

Hi, I’ve activated harvesting on NEM Wallet, but it doesn’t generate rewards. How does rewards work on NEM coins delegated for harvesting?

How much you have XEM? With 10-20k you can hit average one block per month

I’ve got around 15K XEM. How many XEMs can I get as reward if I hit average one block per month?

Not much. Couple. Harvesting is not much profitable. Will immprove a lot for Symbol because you will have block rewards.