While I may not like the picking-and-choosing aspect of it, I do understand it.
Having interacted with a few retailers who intentionally stuffed the 100X books (likewise with Shimmering 7's) to the backs of their bins because the game wasn't selling as quickly as Florida Cash (and therefore making them less money), I get why the Lottery would want to call back unopened books from locations that weren't selling them to send them to locations that would. It sucks for those of us, few that we may be, who'd prefer to play the older games and end up not having as much access to them, but it makes business sense, especially when they're trying to finish up older games to bring in new ones.
My only remaining grudge with them about the issue, really, was that in their push to get new games sold as quickly as possible they've failed to educate their retailers about the alternative method of acquiring games that are running low (which is to say, by calling the warehouse directly rather than relying on what their Orderable Games printout says).
Well, that, and the fact that apparently in some cases they force a retailer to withhold particular games. I didn't bring this up before, but when I bought a book and a half's worth of 100X tickets at a Publix last week, the clerk told me that the reason they'd held onto the two books they had for months was because their Lottery rep told them they have to put out Florida Cash, and can only put out their 100X books if they run out of Florida Cash. In other instances the retailers themselves chose to do this on their own (and told me so), but in the single case of that Publix I was told the Lottery made them. Very annoying since Publix would've had three rolls of Florida Cash running even with a book of 100X active in the counter.