"Got it" is a really weird one too, "Ok" had a hint that you are in approval of what you're seeing. "Got it" is more of a message of "we know you probably don't care or even detest this but you have to tell us you are at least aware of our latest thing".
It is underhanded in the language and has a bit of admission that they know you really just want the modal to just go away.
It was very common in text books when showing nested loops
int nWhatTheCount = 0;
for (int i = 0; i < 10; i++) {
for (int j = 0; j < i; j++) {
for (int k = 0; k < j; k++) {
for (int l = 0; l < k; l++) { // and on, and on
nWhatTheCount++;
}
}
}
}