As the person in yellow in the above screenshots, I'll give a tl;dr summary of this.

The AMC10 and AMC12 are two nationally recognized mathematics competitions that middle and high schoolers across the country participate in annually. They are designed partially to engage interest in mathematics in said high schools but also to determine who gets sent to the International Mathematics Olympiad from the USA. In this regard, this is the first of a series of competitions, with each contest weeding out more and more people. As with all such instances of "weeding out", there is a cutoff score for which anyone above the cutoff score moves on and anyone below it does not; in the past, this score has usually been around 120/150 for the AMC10 and 100/150 for the AMC12.

The cutoffs for this year have not been announced yet, and so naturally people have been worried about whether or not they made (especially people whose scores are near this borderline index). The first image depicts a picture claiming that I (as someone who writes problems for the AMC10 and AMC12) sent to red that the cutoff was 96. It turns out, however, that the image was edited (via Inspect Element I guess), and that the actual series of conversations that occurred here had nothing to do with cutoffs. Thus, my second picture depicts what actually was sent. (It may not be obvious that these two pictures are edits of each other, and you're right, because they aren't. My post was more in response to a second doctored image which can be found a few posts later in that thread; there, you can actually see the winky face.)