It is more likely that FB will up the spending limits and impose a different limit to prevent a flood of something they aren't happy with.
Like M0rtal says, get to the
$50 limit first, a handful of accounts I doubt will cause you any strife. Start scripting 100 accounts and FB will have an issue.
But this is a work around to a temporary problem. FB likes money, they'll up the limits soon enough. But get your groundwork and A/B testing in place now so that you can turn on the tap when they day comes.