An off-the-record source told me that their company did not declare doing business with comapnies in the DRC because the fine (usually around 10,000 USD but varies of course) was easier to pay than dealing with the fallout from dealing with what is in reality for the most part a very corrupt government and therefore by listing a company in the DRC one was essentially admitting to paying bribes to the DRC government. Again, that is off-the-record so the source cannot be quoted directly or revealed but I have reason to trust in its validity which is studies of other companies (those involved in cobalt and coltan mining for example) in which case there were absolutely bribes taking place.