Normally, I will just top up using TnG or Boost to get RM10 rebate RM3 every 10 days as RM10 top up will make your account stay active for about 10 days. In the end of the month, you will have RM30 + 9 = RM39 on your account. About 30% rebate monthly. The hassle will be you need to keep track every 10 days.