I don't know if it helps or no, but I always grease at least once a day, and usually at every fill if I'm near the ride.
So you say it doesn't help? Oh well, its my habit, and while it might be easier to break than smoking and drinking, I need to retain at least one vice.
My former dealer told me once that a laminated bar should last a lot longer than they do, except for the fact that nobody ever greases the tips. To prove it, he showed me a couple out of his trash that had split at the tip, while the rails still looked as if there was some more life left in them.
When I was in school I took down a big boxelder for my landlady and a silver cottonwood for her brother. The brother had a Homelite 330, which was given to me as payment for the work (plus a free month's rent). I used that crappy saw with it's cheap laminated bar hard for a couple of years undercutting licensed tree surgeons and selling firewood, etc. I used up about a dozen chains and 3 or 4 sprockets, but the bar was still serviceable when the motor would hardly run for low compression any more.
Yes, I draw-filed the rails a few times, and the sprocket teeth were like stilettoes, but it still cut fairly straight. I greased constantly, partly to help compensate for the wimpy oiler Homelite put on those saws. But the bar held up good, and I blame it on greasing!