This Stanford study (2017) says 39% of hetero couples meet online today. Wow, that's really high if true: https://www.statista.com/chart/20822/way-of-meeting-partner-...
If everyone spends a stupid amount of time with online dating then that's where a lot of the matches are gonna be even if it's not an efficient way to get that end result.
If couples are finding each other online more than they are elsewhere, then online matchmaking is outperforming offline channels.