it's not clear what the user has to pay for...
does this search engine have its own index or what?
in principle you can make money on a paid search engine but not with this model of services offered to users
does this search engine have its own index or what?
in principle you can make money on a paid search engine but not with this model of services offered to users
if this search engine does not have its own index then the only mechanism it can use is to filter the search results of other search engines
this means that this search engine cannot give you more information than is contained in the index of the donor search engines
what exactly are you paying for?