If they don't have alternative sources of work, then they effectively work for Amazon, and it should be legislated as such. That excuse only works in a labour market with a lot of competition on both the supply and demand sides. Legislative systems really need to be more nimble to keep up with the loopholes that larger organisations can put money into investigating. But yeah, we all know why that doesn't happen.
It's a fair point. If you go to a business and go, hey I've got something for you, are you interested, then yeah that's entrepreneurship. I suppose the difference is that the role there isn't well defined. So maybe that's a significant difference, direction of solicitation.