We look at some of the biggest announcements from Cannes Lions this year, focusing on DSP tie-ups and partnerships in the agency world.  It’s been a scorching week, the sun shining down and the thermometers hitting 30° – and that’s just in the UK.   The sun has been shining down on Cannes too, of course, as the ad tech industry gathered once again in the South of France to connect with other industry members, meet new faces, and rush from meetings to panels to parties.   We take a look at some of the biggest partnerships that were announced this week on la Croisette… This week’s DSP deals  On the first day of Cannes Lions this year, Amazon announced a partnership with Roku giving the e-commerce giant’s demand-side platform (DSP) exclusive access to Roku's connected TV (CTV) ad inventory through a shared identifier.