I'm guessing this doesn't include YouTube since their 3.5B YouTube views alone gives them 3.5B/150 = 23M equivalent singles. Add their 1.8B Spotify streams giving them 1.8B/150 = 12M equivalent singles, and that's already 35M equivalent singles from YouTube and Spotify alone. Either that or they use a different formula to RIAA/Billboard, or they convert streaming into albums instead of singles.