The Bumble Inc. (BMBL) app is shown on an Apple iPhone in this photo illustration as the dating app operator made its debut IPO on the Nasdaq stock exchange February 11, 2021. REUTERS/Mike Blake/Illustration/File Photo Purchase Licensing Rights, opens new tabAug 6 (Reuters) - Bumble's (BMBL.O), opens new tab paying users fell in the second quarter, the dating app operator said on Wednesday, clouding hopes of a quick turnaround and sending its shares slumping 8% in extended trading.The company, w...