Have you been running this for long? I've looked for something in this space for the last couple of years but only came across MapTiler /AGOL and a few others, that were either pretty expensive (for small datasets) or restrictive functionality.
If so I'd say you need to work on the SEO and findability side.
Large amount of US popular is clustered around key areas (East Coast corridor, West Coast Corridor, Midwestern cities etc.
No reason these couldn't be linked up and are more populous than many equivalent regions with HSR. It's like power grids, noone is arguing that one big one from SF to NY is the right solution.
Well it's more like Google is victim of rent seeking. Pay me $26b or Bing will be the default. Google has clear first choice preference across a large swathe of the market.
If so I'd say you need to work on the SEO and findability side.