All of the company executives including going back to Cyrus have referenced Keytruda by name and not any of the others. The most reasonable reason is that it is the largest selling and most well known ICI to get the concept across. However, it could also be a way to telegraph information to shareholders without violating an NDA. Dr. J also said they have had discussions with most of the companies thst make these drugs, so it may ultimately come down to how good our data is and who gives us the best terms.