> There are two ways forward that I can see:
> The paid subscription model
> Donation funded, non-profit model
No! There is a 3rd! You could do a search app eco system where you leave the unlimited overly complicated puzzles a search engine could address as an exercise for the user.
I always have a bazillion ideas but couldn't think of a single good phone app before mobile phones. I mean, should I want my phone to be a gaming console? It seems ridiculous. Writing is writing books, all other kinds are watered down. Do I want to write books with an onscreen keyboard? It all sounded idiotic, nothing worth using.
But the idea you mention, typing an overly popular domain name without extension should take you to the website directly... What you are trying to say IMHO is CLI! Search is just the failback if the provided query/instruction doesn't make sense to any of the apps.
I cant think of many but there are no doubt thousands of activities that could benefit from an at least somewhat themed search engine. An app could be a biochemistry web directory that ranks results from a chosen sub folder above the normal results.
Any FOSS or other company could create a web dir tree with the few or many pages about it self. A check box lets you pick the ones you want to query. Normal results go under those results. The biochem wont bother you when searching for pokemon.
People love my stores. What they really want is to see illustrated results from my inventory above all other results. Uncheck the box if you are not in the mood. (edit: I'm joking of course but I do have a good fews shopping apps that I actually use)