MEGASync: is it truthworthy?

Two things I’ve heard there were security issues with their servers, but never found any specifics. Is it true? Now, I’ve reinstalled the Android app, and I got the ““usual”” cookie popup… >Create profiles for personalized advertising […] 104 vendors. >Match and combine data from other data sources. >Link different devices. >Identify based on information transmitted automatically. So does this BS mean, that even tho my files are E2EE, but whenever I use their app, my persnoal files are used to personalize ads for me? >w<