I think, not too monopolistic. The thing is that a lot of people working with the reliable brands like my favorite work just with them. And that is the reason I like the high quality cosmetics to use.
And what about the current situation with the cosmetics market? What are the best ones?
A good and quality brand can easily find it's place in the market with right marketing strategy. Even cheap and harmful Chinese products are finding a space in cosmetic market so no monopoly in cosmetic industry.