I'm big on giving credit where it's deserved, so I'm keenly interested in who is actually responsible for breaking the F3 and related spoilers. As in, who was first to bring it to the public, whether it was here or elsewhere. I think that information is available but shit got so muddied this season that it's all a mess in my head and I'm not into it enough anymore to sort it out myself.
I think a lot of the "sources" were people just copying the original(s), sometimes adding their own detailed guesses. I suspect, as many of you do, that TFB was one of these copycats, but that's as far as I'll go with that accusation to give him room to prove otherwise. At the same time, there were certainly people who got the info independent of each other, and I would nominate folks like SU, surspo, and probably SmatGuy for this category. Each of these folks deserves kudos in turn.
However, what interests me most is the idea that all of these "independent" sources may ultimately have been drawing from the same well: one mega-source who went around spilling the beans to multiple agents who each legitimately claimed the info as their own. There is a suspect for who SU's source was in earlier seasons, and that person was also in a position to spoil this season as well. It stands to reason that this "prime mover" was responsible for ALL original instances of the F3. It's a simple and plausible explanation for why we seemed to have so many independent claims of Sarah/Brad/Troyzan.