Everybody and everything can "provide a platform" if you do enough mental gymnastics. The AWS infrastructure you do you business on 'provides a platform'. The networking devices that route customer traffic 'provide a platform', the browser API 'provides a platform', the CPU that you code runs on also 'provides a platform'. "Providing a platform" doesn't entitle someone to grab 30% of sales from a business. If I rent office space, I pay the rent which is a mostly fixed amount, I don't pay them 30% of sales from my business - Yes, not a perfect analogy, but you get the point! Grabbing 30% of sales is just unethical, but that is just my view.