A new kind of ADHD clinic is cashing in on surging demand for diagnoses — and promising salaries of more than $900,000 to recruit psychiatrists. "A lot of psychiatrists have closed their books … because they're just overwhelmed," says Christopher Ouizeman, a director of the ADHD Foundation. "Nobody is watching a 15-second TikTok and being like, 'welp, that's solved, I've …