There are 3 levels:
Bronze,
Silver (also includes Bronze),
Platinum (also includes Bronze & Silver).
When you are logged in, you are at least
Bronze.
Silver is given automatically up to 24 hours after you make your
first 25 posts. It can be lost due to inactivity or breaking of the forum rules. Once lost, it can't be achieved again, unless you become Platinum (which includes Bronze & Silver).
Platinum is not given automatically. You have to
sign up for it manually AFTER you have fulfilled
all the requirements. Platinum level can be lost, but it can be regained.
There is a fourth level:
Loyaler. It can't be achieved. It's gifted to certain members only. They don't see exclusive passwords, AFAIK, but they can obtain all passwords earlier (before Platinum members). If you notice that some members already registered to a tournament before the password is shared in the Platinum level password thread, these players are Loyalers.
The difference between the levels is simple: certain subforums & threads are locked to members who don't have the needed level. Such threads contain the passwords to the freerolls. You won't be able to open a password thread that is restricted to a level above yours. I don't know of an easy way to tell what your current level is, but you can always try to open the restricted threads. If you succeed, then you have at least that level.
Click to test Bronze Level :
Password Thread For Bronze Level Freerolls (All Members)
Click to test Silver Level :
Password Thread for all Silver Level Freerolls
Click to test Platinum Level :
Platinum Level Freeroll Passwords subforum
The first link should open for everyone. The second should open if you are at least Silver. The third link most likely won't open, unless you signed up to become Platinum and you were accepted after the reviewal process.
According to this thread...
SportsBetting Poker $100 Freerolls - Wed. & Fri. 8PM ET (Silver & Platinum Levels)
... you'll need
Silver Level to be able to play on
Wednesdays. You'll need
Platinum to play on both
Wednesdays and
Fridays.