Some pricing info from Line:
Line charges companies a one-time fee of over $6,000 just to create an account on the service.
It then charges the companies for messaging their followers directly. Prices start at around $5,000 to send 15 messages a month to 100,000 fans and range all the way up to almost $17,000 each month for 30 messages to 500,000 fans.
The company also offers one-off plans for companies that want to do short bursts of messaging rather than for months at a time.
As a way to help companies gather fans on its service, Line charges over $33,000 to let companies offer cute branded “stickers” that users can place on their profiles.
via Asian Startup Making Money Off Of Chat – Business Insider.