If I’m a reseller, do I have to sell only Digium products to gain access to the use of the trademark and AdWords?
No, you may sell Digium products as well as others as an unaffiliated reseller. Digium Authorized Resellers receive a long list of entitlements far beyond AdWords use, such as market development funds, marketing and sales tools and support, use of the Digium|Asterisk logo, deeper discounts and an assigned channel manager. To learn more, visit http://www.digium.com/en/ecosystem/resellers/.