In reverse order....

4. its suggested only a handfull (i.e not hundreds) will make a clear million from online poker this year, even in big games. therefore what you say has to be true. At the same time pro means that you make your living from poker and certainly you'll find people at all limits who do this well.

3.
Think of a network eg Partygaming, or cryptologic as a room that has many doors. Each door is a skin and all you do is enter through a different door when you enter a network pokerroom via a different skin. Each skin obviously has its own hook, so yeah some will have a BBJ some wont etc

2+1, dunno i dont play live.