Well, suppossedly what they would offer doesn't seem to change things much:

Future Pricing Plans

We have a few product ideas we have experimented with that would be paid add-ons to the current service: collaborative tools, AI integration, translation tools, and premium text to speech voices. Of these features, the premium text to speech voices are the only one that are currently available in the app, as part of our "ultra realistic voices" beta.

https://docs.omnivore.app/about/pricing.html