TORONTO (Reuters) - Research in Motion is extremely encouraged by the response to a program of incentives aimed at persuading its biggest clients to run its soon-to-launch line of BlackBerry 10 devices, said a top company executive on Wednesday. RIM is betting that the devices, set for a January 30 launch, will revive its fortunes. But that may depend to a large extent on the response from RIM's top customers like government agencies and corporations, who have long valued the strong set of security features that BlackBerry devices offer. ...