What the Fallacy?!
The Texas Sharpshooter
The Fallacy
Cherry-picking data clusters to suit an argument, or finding a pattern to fit a presumption.
Why it's wrong
This 'false cause' fallacy is coined after a marksman shooting randomly at barns and then painting bullseye targets around the spot where the most bullet holes appear, making it appear as if he's a really good shot. Clusters naturally appear by chance, but don't necessarily indicate that there is a causal relationship.
Example
The dating app claimed to be the most successful in the world by highlighting the three couples who got married, while ignoring the millions of users who never got a single match.