Regarding creating a demand for endangered or rare orchids species...
Personally, I don't think that an orchid should be included in the calender if there isn't a readily available supply that has been propagated from seed or tissue culture and is reasonably affordable. It seems pretty straightfoward that it puts a strain on wild populations to create a demand for orchids that orchid nurseries do not carry. To break it down even further, when demand is greater than supply, prices go up which increases the incentive for people to illegally collect and sell those sought after species.
In the cases where there are available and affordable sources of nursery propagated but threatened species then those sources should be prominently displayed beneath the photo. The sources can be listed for free as a sort of 'thank you for providing a legitimate source for these orchids that we love so much' or the space can be sold to the nursery that offers the highest bid.
Obviously, standards of availability and affordability are subjective but most will probably agree that one nursery offering the species for $100 can't really be considered readily available or reasonably affordable.
This guideline shouldn't just apply to the calender but to forum posts as well as
AOS magazine articles. It's really just a matter of ethical consumerism. My apologies if it sounds like I'm riding a high horse but I know from personal experience how easy it is to assume the best when you find an orchid that you've been looking high and low for.