After some research and communication with other CSG members, I have been able to confirm that the quotas levels for these new species were based on the IUCN Red List assessment levels. Fortunately these assessments are pretty recent and include a lot of information on geographic range and population levels, which would be necessary to assess risk to the species'. A set of species were proposed for quotas (although I've not been able to determine how this list was come up with) and species assessed by the IUCN Red List as Critically Endangered or Endangered were given a 0 quota, Vulnerable species were given a 50-250 quota, Near Threatened species were given a 300 quota, and Least Concern species were given a 500-3000 quota. These are just the quotas for this year and can be adjusted in the future pending any further assessments.
Regarding the current discussion on feeding species like Brookesia minima, its important in general to remember that while these species may not have been successfully established in captivity long term when they were imported before, there is still a lot of information available from when they were that will be important for new keepers to reference, lest they risk repeating the same mistakes over again. In the case of B. minima and similar species, there are husbandry articles, particularly in German, that are 30+ years old and much of their information is still extremely relevant. Like Carl, having personally kept B. minima, I can attest to the fact that springtails, aphids and small fruit flies are reasonable feeders for adults. This is also echoed in published articles on them (ex: Schmidt & Simon, 1988), with notes that even the offspring can be fed young aphids and springtails.
Chris