Help me with the meaning of one phrase, please

[Whitefox]

The Circle of Bosses (C.O.B.) is a network of people that amass prosperity and happiness by reinventing the term “boss” into a life elevating philosophy – meaning that an individual, without being cut-throat, can be the “boss” of his/her destiny.

With the fruits of labor the doors to success become wide open. No matter your income or social status we all share the same connection, we want success.

C.O.B is the next BIG EPIC movement in the Music, Film, Television, & New Media industries. You better get our rookie cards now because the price ain't coming down. Ssuut Ssuut C.O.B.

What does "rookie cards" mean? I know its the baseball cards or whatever, but I dont understand how is it connected with the meaning in this sentence. And also, what does "ssuut ssuut" mean?

[PAINKILLƎR]

To invest in them now, because it'll be worth more in the future maybe

[Whitefox]

To invest in them now, because it'll be worth more in the future maybe

Thanks

[TonyTilt]

The Circle of Bosses (C.O.B.) is a network of people that amass prosperity and happiness by reinventing the term “boss” into a life elevating philosophy – meaning that an individual, without being cut-throat, can be the “boss” of his/her destiny.

With the fruits of labor the doors to success become wide open. No matter your income or social status we all share the same connection, we want success.

C.O.B is the next BIG EPIC movement in the Music, Film, Television, & New Media industries. You better get our rookie cards now because the price ain't coming down. Ssuut Ssuut C.O.B.

What does "rookie cards" mean? I know its the baseball cards or whatever, but I dont understand how is it connected with the meaning in this sentence. And also, what does "ssuut ssuut" mean?

Lol ssut ssut is what Crooked I says, "ssut ssut, COB!!!" is usually what he says. Think of it as stuttering on the C in COB.