Crossover is a website that purports to “Accelerate your career and work alongside the top professionals in the world – from anywhere”
I found a few jobs advertised on LinkedIn in which you are supposedly going to be working for crossover. I think. Because it's a bit hard to tell who you're working for. An Example
So a Google search found this:
https://medium.com/@whistler_12777/heres-why-crossover-is-a-scam-78f2e867b3a0
And because of the way it's written I'm not even sure if that's legitimate.