I think OP might be referring to the dividend that's been paid to equity holders in recent years? Wish I still had the report they recently mailed out and can't seem to have any luck finding it online, but I do remember coming out of reading it with the impression that the balance sheet has had a good year. Didn't read every word of the report to see if hand is tipped on if intent with some of that cash growth was to dividend out to members further or to use for future expansion/growth... but did find old 2013 and 2014 news articles online from December of both of those years when they had made dividend announcements right around this time.
The one thing to keep in mind is just how competitive of an industry they're in and the fact that a major competitor is (maybe?) in the process of being acquired (MTS/Bell). Just total speculation but wouldn't be overly surprised if they decided to be as prepared as possible for any changes/opportunities that might mean by investing that much more aggressively in growth.