From flash sales to perpetual contract design, the overlap in timelines among competitors indeed makes people overthink.

Polymarket suspects that competitor Kalshi is involved in corporate espionage and has compiled an internal document titled “copycat,” recording around ten-plus cases in which suspected products, marketing activities, and interface designs were imitated or preemptively launched. Polymarket market director Matthew Modabber said, “There are just too many coincidences,” including cases such as a free grocery pop-up event in New York and perpetual contract products. Kalshi denies the allegations, calling them “near delusional,” and says it will continue building its products; Kalshi’s investor Paradigm also denies monitoring Polymarket’s office. (New York Post)