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It has competitors, sure. But what the competitors don't have is user base and mind share. Maybe _de facto_ or _effective_ monopoly is more accurate?

I think you are off base here. I use hinge primarily and occasionally bumble. I haven't opened up tinder in months.

They are all owned by Match though, they're not actually competitors.

Bumble is a public company (BMBL). Where are you seeing they are owned by match?