Some do well, and some don't. Maybe there is an ebb and flow to it. Log the sales results, get the winter training roster from all the major training centers (some trainers won't show up on those because their facility doesn't publish one), and track the results. Top trainers start out with more than just what they/their owners purchased, because many are also sent horses (homebreds). Alagna is a good example. He's been sent some regally bred horses for years now. Good horseman, good trainer, but Tony has simply had a bad run. Even his owners say so, LOL. His earning were over $9m at one time. That dropped to 7 and change, 5 and change, and this year, he's what? Sure, there's reasons, but at the heart of it, he's simply had a bad run.