There are ppl who may only do textings, But SOMETIMES require Talk Mins for Small Stuff
IF PM offered Mins Talk Add-On, PPL who only require it for JUST small items, like Telephone Banking, or Occasional Hello's, Offering this can certainly assist in retaining the Long-Term Loyalty of ppl who only want what They Absolutely need, and Require SOME Flexibility to remain with Carriers for periods of time