Would you mind dropping the link talking about this point? (context: I'm a total outsider and have no idea what TFA is.)
It’s the same origin. On Slashdot (the HN of the early 00’s) people would admonish others to RTFA. Then they started using it as a referent: TFA was the thing you were supposed to have read.
I miss the old Atomic MPC forums in the ~00s.