Ok. So @latewood can speak best to this but I can answer most of the questions.
This site is the ILGM free support forum set up as a community site for growers around the world to get together and enjoy hassle free discussions. This is the backup site for the seed shop.
From this site Robert developed his lab. based on his experience and the discussions here he put together a full course in growing from seed to harvest, soil and hydro. To support that site there are forums just like this one for lab members. Access to those forums comes when you join Bergmans Lab. You can get lifetime access for a one time fee or make monthly payments. In the latter case the modules become available as the monthly payments are made, a new module or two each month. But access to those forums is available from day one.
You get the full Grow modules and personal assistance from commercial growers (up to a point, they won’t set up a giant Grow lab for free ). That’s my take.