It is Ok because it is not my native language either.) I see Mark answered this question:
"I think 25% of the SBD half of your rewards is a fair number but if you feel to give more that's up to you."
I think it will help to avoid such unpleasant talks in the community.
I agree! I'm just writing about the fact, that I looked at the history of my wallet and my donations are just about 25%. At first, I didn't think about people make donation to the community. Later, when I read the rules and some posts, I realized that I could also donate and benefit the community. I didn't think about the amount, so I often listed SBD before publishing a post. Mark's words bring clarity to our dialogue)