Telegram is riding high, adding tens of million of users this year. Now the bill is coming due.Telegram is one of the few significant social-media challengers to Facebook Inc., FB -1.90% on a trajectory toward one billion users active each month by the end of 2022, up from roughly 550 million today.
واحد بهداشت| مرکز پژوهشهای علمی دانشجویان دانشگاه علوم پزشکی تهران from us
