Where does the contribution come from if the user has zero responses?

Question

Toaster

Contribution is 1 for this user even though there are zero replies! How so?
The certificate does not say anything about the contribution resulting from questions, comments and other figures. It is only said that the answers are taken into account. So where is he from?

Answer 1

Previously, if 3 people subscribed to your question, this is 1 contribution

Answer 2

There is a comment, but for them it seems that the contribution is also dripping