Blockchain Start-Up SIRIN LABS Signs Leo Messi as Brand Ambassador ByAziz Abdel-QaderPRO INVESTOR Updated: 14 December 2017 DisclosureWe sometimes use affiliate links in our content, when clicking on those we might receive a commission – at no extra cost to you. By using this website you agree to our terms and conditions and privacy policy. The start-up’s officials did not reveal an exact figure for the deal cost.