The phrase "exclusivity arrangement" refers to an agreement or relationship where one party is given special or sole access to something, meaning others are excluded from it. Full definition
And, of course, Sony already has an existing DLC exclusivity arrangement with Activision. (tiredoldhack.com)
Rumor has it that Capcom and Sony are discussing a 6 - 12 month long exclusivity arrangement for Resident Evil 6. (snackbar-games.com)
This Mr. A. says that while Apple will introduce the device on Verizon, there will not be the same type of exclusivity arrangement that ties the iPhone to AT&T. (pcworld.com)