No offense, but not many people want to give up their exporters. All exporters that deal with cites animals have a quota they can ship out and once its gone they dont ship anymore. So if a bunch of people have that exporters info his quotas get taken faster and the people who gave up the exporters have a chance at losing potential animals to buy.
On a side note, with a lot of research you can find quality exporters. It took me about a year, but now that I know what to look for, exporters are pretty easy to find. But I think the research is a pretty important part of importing animals. If it was so easy to do everyone would do it