We wanna bring our technology to the mass market, Messi has the audience (90M people follow him) and he's humble even though he's the best ever, he inspire us and we feel we share values.
Surely it's a nice move from marketing point of view. However, I personally would like to know about the details of this contract
Messi is Sirin Labs' brand ambassador, and in spite your curiosity the company does not discuss its internal commercial info.