That’s fine. If this suggestion is implemented, there should be a clear indication if the project is available via a third party and not directly on itch. So you can avoid such projects if they are not your cup of tea.
And there can be extra guardrails too, like your project must be otherwise present on the platform. So itch doesn’t turn into an ad board for 3rd party services. Though I think it’s a bit premature to worry about that. And, besides, that can already take place regardless of this suggestion, as you are not required to upload any files for your project.