I don't think the OP sounded like he was attacking anyone, or aggressively asking the question, but it is a good question. I was a little confused with this concept when I joined, however I had some great guys here on this forum explain and introduce me to this. Below is the original post from the MASC Forum on DBTC Intructions. Certainly he is helping to "spread coral species thoughout the region" (to other hobbyist reefkeepers and not for profit to stores, farmers, wholesalers, etc) and secondly is doing everything he can to "lessen the impact of taking corals from the oceans". Wasn't my DBTC to begin with, but I would call it complete because he paid it forward, abiding by every basic fundemental idea in the spirit of DBTC.
I still don't get it. Why do we have this?
The idea behind it is to help spread coral species throughout the region. This will hopefully lessen the impact of taking corals from the oceans, as well as help spread diversity throughout the area. The idea was a way to push a non-greedy method of helping get corals out there to people. If you can get a coral fragment from a local farmer, that means less of an impact on the oceans. A great many of the "abundant" corals are not in any way marine/aqua cultured since it's still profitable to hack them out of the seas.