Ah, Mantisfart (what a cleverly chosen name!), you have now done what in American jurisprudence is called "opening the door." By overtly calling Ian's business ethics into question, you have opened the door to an attack on yours, admittedly an easier task than the one that you undertook in attacking him.
I will avoid some of the more obvious reasons why Ian may have not have raised gongies (after all, only he knows for sure). I am sure that you remember from your own uni years, though, that studying for exams can put a dent in your insect rearing time. I believe that your ersatz moral outrage, though, is in fact a reflection of your unhappiness at the fact that his sale of wild ooths may have cut into your sale of domestic ones, and indeed your offer at the end of yr last post, (unless of course, you were offering them to him for free) tips your hand. You are a merchant, touting your wares like any other merchant and, unable to find a way of promoting your product, attacking that of the opposition.
Usually, though, such "moral high ground" appeals ("we only sell coffee from fair traded coffee beans") are launched by professionals. Yours, obviously is not. Not content with one swipe at your competition, you take two swipes that cancel each other out!
The first: Wild ooths are notoriously collected by kids who have little or no idea of the species that laid them. Often, such ooths are of a species other than advertised, are parasitized by wasps (a strange objection. A good friend recently sent me such an ooth, wasps and all. I knew that the ooth had to be fertile and in fact, it hatched 30+ nymphs, of Stagmomantis limbata), hatched (bummer) or infertile (likewise). These arguments are great as they stand, but seriously bite into argument #2.
The second, which you actually apply to Ian's ten (count them, ten out of the continent of Africa!), is that by buying them, he runs the risk of seriously depleting Africa's limited population of (fill in the species blank) and threatening their existence. You may have picked up this argument from Christian who was at Hamm today, marketing his own home grown merchandise. I have been in Africa, out in what we (probably ignorantly) called the bush of Kenya, and I would challenge anyone to say that any species of African insect is, or is at risk of being, wiped out. WE DON'T KNOW! I don't hear anyone object to the hundreds of thousands (millions?) of mounted insects in museums, and every mature female mantid may represent a number of ooths lost to the wild. The threat to any insect comes from the destruction of its habitat, not the action of a few amateur collectors, whose cache consist mainly (are you arguing this point?) hatched, infertile or parasitized ooths. Again, Christian has stated that although he lives in an area affected by CCS, he still takes bees because the number he takes will not impact the population. I agree, but do I smell special pleading here?
From your list of mantids in culture, Mantisfart, you appear to be a most able rearer of mantids, certainly light years ahead of me. Such skills are what seem to count on this forum, and rightly so. I am sure that there is a lot that we can learn from you about mantid husbandry, but any issues of moral turpitude that you may harbor are of little interest to anyone here, so there is no need to advertise them.