Completely agree with this. When I go on Grindr is because I want the reciprocation and the desire to please someone else while I am being pleased too. When I go looking on RM is because I want a specific service tailored to my needs and desires. That is why $ is involved.
The "not responding"/"ignoring" part of Grindr is cultural, in my experience. Here in North America people that are not interested just don't engage at all. In Europe, where I used to live (particularly France), people were more upfront: "sorry, not interested", "sorry, not my style", etc. I personally prefer being upfront, but I understand that can be perceived as rude by people not used to it.
Also, as someone mentioned, if Grindr detects you are soliciting, they will ban your account. Don't do this. This is why we have other websites specifically for business.