I went through the news release section of their website. Most of these ad/marketing software companies can not use client names in NR bcs its supposed to be an investment in competitive advantage. So far what I can see on their website and in presentation in the last few months is.....

https://dgtlinc.com/investors/press-release/

Draftkings - influencer
Twitter 
Youtube-Google
the NFL 
CBS-Viacom-Paramount
Microsoft Xbox
P&G-Gillette
Pepsi (multiple brands)
Bron (Le Bron James production co.)
Currency.com -  influencer

And from calls with IR 

Hulu-Disney
Netflix 
Citibank
Progressive

etc 
etc
etc