At one point Dubsmash had 200 million users (https://stackshare.io/dubsmash/dubsmash-scaling-to-200-milli...) and in the acquisition press release they tout how 25% of black teens were on the app (https://www.redditinc.com/blog/reddit-welcomes-video-platfor...). They had fallen from their heyday by the time Reddit bought them but even still taking those numbers at face value it's probably the worst acquisition of all time