Low risk, maybe but the main thing is low returns. But don't underestimate the risks...Yamato made every variant a Macross collector could want and some in a relatively short period of time and look what happened to them. Don't want to get any more into a discussion about how supply and demand works but there is no reason for Bandai to worry about a few people whining that they couldn't get a Macross release they wanted or that they want more Macross releases because they will get to it when they get to it. Meanwhile, pump more resources into other items that they know there is much more demand for and therefore profit involved.
It's safe to assume most Macross collectors also collect other high end toys and if all of a sudden, Bandai released every version of the VF-1 in a short period just because they could, a lot of us couldn't or wouldn't keep up and you get another repeat of the Yamato situation where a bunch are on clearance for a while before they all dry up and by then, Bandai won't want to deal with Macross and what's left in the secondary market skyrockets even more for the few of us to fight over.
Basically, just chill and get the releases you want when/if they come and don't worry about it so much.