1-for-1 promo is quite strict in the last event for both Simba and Eight, only available in the roadshow. Though some Service Centres and authorized dealers said they were included, it could be a purchase at your own risk (unless someone can confirm they did that with Shopee sellers in the last event). So the likelihood of 1-for-1 +5% is slim, however 3 mths free port-in offer and 1-for-1 has a higher chance to happen concurrently again.
I tend to think one for one top-up offer is unlikely to happen again since Starhub CEO's priority is to raise the ARPU.
The removal of the eight S$8 and S$10.8 plan for the new users clearly shows this direction.
Removing the legacy S$10 Starhub Prepaid S 5G plan and replaced it with S$12 4G plan is yet one more indicator.
Increasing the price of the Starhub 5G Lite plan from S$22 to S$25 and now S$28 is another one. Moreover this plan can no longer enjoy 20% OFF Passion Card offer.
On the Fibre Broadband side, the recent increase of the price of digital voice from S$2.14 to S$5 is yet another indicator. They have downgraded the free bundled router for Starhub 5Gbps plan from HB710 to HB615. Moreover, they raised the Starhub Shop cash and carry price of HB710 from S$192 to S$240.