It's hard to say cause I did small marketing on my games. So I couldn't say if people who pay attention to my games were coming from that marketing or from other source. Though according to analytics here some people found my games by browsing the engine I'm using. Most views of my games are from google though.
As for games published here with no marketing, well they will be buried under newer games for sure. IOW unless people were looking for the former, it would be hard for people to even know they exists.