I really doubt they care, the juice just isn't worth the squeeze for them. Its an incredibly difficult crime to prosecute for, even if the people were operating in the US, which they almost certainly are not. They really only care about the highest of high people cyber crimes (silkroad, anontalk, lulzsec, etc), because it takes a dozen or more agents months to years to resolve a single one.
Generally when it comes to this sort of stuff, if you cant hand them all the evidence with a bow on it, they don't care unless it involves an imminent terror attack, or major drug/CSAM ring. This doesn't just apply to us average joes either, every cop I know (so, 3) who has ever tried to pass something they viewed as important to the feds, has been stiff armed and told that it's not a priority.
Generally when it comes to this sort of stuff, if you cant hand them all the evidence with a bow on it, they don't care unless it involves an imminent terror attack, or major drug/CSAM ring. This doesn't just apply to us average joes either, every cop I know (so, 3) who has ever tried to pass something they viewed as important to the feds, has been stiff armed and told that it's not a priority.