South Florida takes those beloved 'B' claimers in a new direction

I was interested to see the Gulfstream twist on the popular "alternate condition claimer" (which is often denoted in the Racing Form with a 'B' at the end of the race condition). The alternate conditions have gotten more and more complex since I first started seeing a lot of them in 2005 or so. But the one element that has remained fairly consistent is that 3-year-olds of any stripe are eligible for the races. The traditional mix is 3-year-olds vs. older horses who haven't run past certain conditions (like winning a certain number of races lifetime). In Gulfstream's 7th on Sunday, I notice that only 3-year-olds who hadn't won in the last six months were allowed. This is interesting; had 3-year-olds really been running roughshod over the poor older horses, who needed to be protected from them? I wouldn't think the problem could be a particular monster 3-year-old; the claiming requirement alone should discourage such a creature from forming. Even the fact that Gulfstream is making the alternate claimer MORE restrictive rather than LESS restrictive is interesting. The species has generally been getting more and more open, obviously to draw more and more contestants (i.e., larger fields).