Well... to put it simply (from what I've learnt), they owe the users a usable interface and functions because users can switch to better platforms when given the chance, which we haven't.. yet. So.. yeah If there's suddenly a platform with the same features as itchio but with multiple tag exclusion feature, a LOT of people would switch pretty quickly, if said platform is developed in the right ways (feel free to ask about the details).
I’m glad you are willing to make the best of this discussion, which others have failed before. Note that what you are saying is that the devs of itch.io have an interest in adding this feature. That has nothing to do with owing something to users. I already addressed this aspect: the people asking obviously have that interest. I trust Leafo that he knows what their best interest is. They’ve heard you, they just don’t agree with you. For me, that’s the point where I would think about the leverage I can find or drop the case. In a way, this thread is sort of this leverage: showing your number, I just want to remind people that being rude is not how you get people to agree with you. A handful of mere “+1” would do more I guess than 1 good, reasonable point made. I wish you success in your endeavour.