> But Venmo users have found it’s also an extremely effective tool for keeping tabs on friends, partners and exes, researching crushes, and in some cases, uncovering infidelity.
That line and the article title are unsubstantiated. The three interviews are with two young college students and one 28 year-old guy whose ex-BF has a coke problem. Unless I missed it, there's nothing in the article about a cheating spouse.
It's just HN's daily 2minutes clickbait.
“Not that I care,” she said. “It’s just interesting to see.”