You might want to ask those questions when you are about to recontract as Globe's offers may vary and subject to change from time to time. However, just to give you an idea, the offers for a new subscriber and a subscriber who would want to recontract are almost the same.
Loyalty is just a marketing term and the only thing different (from the offers to a new subscriber) is the offer for bill rebates which could be around 47% of your plan assuming that it does not fall under the "Best Ever" plan. Even that they took away in the "Best Ever" plan (which before was possible).
Take it from a "loyal" subscriber of 20 years.