I think this misses the point. You build on someone else's platform because they provide distribution. Without their platform, you don't get their distribution.

I think this misses the point. You build on someone else's platform because they provide distribution. Without their platform, you don't get their distribution. So what does that get you? This is akin to saying, "don't sell at Walmart." Yeah, I risk Walmart taking my profits away and risking my business - the very profits and business that Walmart's distribution has provided. Distribution is king. Live with it.