As for the moment, Globe has suspended the rebate rewards for postpaid subscribers.
Globe is transitioning to the new "Lifestyle" Plans and would want the legacy plans to be shifted to these plans. According to its FAQs MyLifestyle Plan Re-Contracting | Postpaid | Help and Support, the bill rebates (recomputed) would be available by February 2015.
I currently have bill rebates. Can I change my plan to myLIFESTYLE Plan while keeping my rebates?
You may change your plan to myLIFESTYLE Plan with bill rebates (to be available by February 2015), as long as you don't avail of a handset. However, your rebates will have to be recomputed.
Your existing terms and conditions would follow as long as you do not change the promos included in your existing contract. Globe however is not obliged to offer you anything to encourage you to continue (like bill rebates or devices).