1) Yes, but you can get the mentorship without the burden of the investment, which locks you into a specific idea and protects you from learning how to make money.
2) Absolutely correct. If you're just starting out, don't start one of those companies. These are great companies to start after you've built something profitable and learned the basics of running a successful business. Why not start a lottery ticket company (that's how I call them) first? Because they're harder and less likely to succeed. I'm a big fan of setting yourself up to succeed. :-)