[behindsight]

You might be interested in the upcoming Digital Markets Act by the EU that is built to address this among other things.

https://digital-markets-act.ec.europa.eu/index_en

Notably you can check out their list of gatekeeper services

https://digital-markets-act-cases.ec.europa.eu/gatekeepers

[panarky]

When I sell products or services on a marketplace like eBay, Etsy, Airbnb, Uber, Lyft, Steam, Shopify, Apple Store, Amazon, etc., the marketplace handles the payment and the marketplace takes a cut for themselves.

How is Android any different?

[behindsight]

It seems the 2nd EU link of gatekeepers in my original comment is no longer loading as it was before, but this link with "_en" suffixed to it does; can't edit my previous comment though.

https://digital-markets-act.ec.europa.eu/gatekeepers_en

In there you will find pdfs for each entity with not only the qualifiers/assessments, but also the counter arguments they presented.

For example, here is one from Alphabet that also brings up your point in the counter argument

https://ec.europa.eu/competition/digital_markets_act/cases/2...