(starting Jan 13, 2014)
To clarify, my source is a phone call with a LI rep yesterday (which happened for a different reason - namely - my LIR account was charging to send InMails to group members back in November (which shouldn't have happened back then) - this is a long trace following up...it almost doesn't matter anymore but I would love the support to get better.
The rep said that:
1) InMails in LIR to group members are now becoming paid - starting Jan 13. He said that "frequent" users of those have been notified
2) He also said that free messaging on groups is going away for all. He was pretty clear on that. I would love this not to happen, of course! I am a fan and a frequent of group messaging for sourcing candidates (of course, making sure it's very targeted and personalized).