Sometimes it happens that product owner says that he wants a new feature to be added to our information system and he wants it because our users want it. But the real situation is that 1 or maybe 2 users have expressed their wish to the owner and now he extends it to all users.
Because every additional functionality or change adds complexity, it should not be done on 1-2 users request if there are 10000+ users.
My question is, is there any good guideline how many of the users should be positively affected by the change, so that it "pays off". In case this situation happens, I can say for example "we need to evaluate your request and if about 20% of our users are interested we should make it".
I'm not talking about fixing bugs nor financial profitability.