Said politicians with initials RB and TK and CS were implicated. Anyone have guesses supposing this was legit?

Let me add the full quote for you, since OP too lazy:

Dropping a small piece of information, take it however you may. I will not provide any picture's for proof as I don't feel like clearing metadata. I likely will not reply back to any questions, unless they are questions I do not mind answering.

Information was finally submitted from the FBI to the DOJ today at 3pm. Mr. Sessions was briefed 3 weeks ago as to the investigation in its entirety. Once assumes his position, arrest warrants will be signed, and arrests will be made. This is also why the Democratic Party in DC has been fighting the Sessions vote. Panic.

Furthermore, starting Monday or Tuesday of next week, you will begin to start seeing arrests of individuals. Over 30 politicians (many are household names), and over 40 other individuals throughout DC, VA and also a handful in NYC. Some may off their selves before they are apprehended , so keep a eye out for that over the weekend, and you will know they are involved in some manner.

The child pedophilia ring / sex trafficking arrests California was not related, at least no evidence yet to suggest that it was. May be wrong has people begin to talk, or make deals on the matter.

02/03/17(Fri)04:48:48 is the date stamp on this. I'm Eastern Time Zone and it's 12:02 a.m on 02/03/2017. Where is this "informant"? (Edited to add current date.)

Original thread (currently active) - http://boards.4chan.org/pol/thread/110768785/doj-fbi-insider-pizzagate

Take it with a big grain of salt. A lot of LARPing happens on 4chan.