Why the benefit less?
First of all, many promo floating that is less than $20, for example recent 80GB gomo & 50gb giga that include caller ID with very high talk time and data. This mean cheaper overall. There’s even cheaper option like $15 Changi mobile 40GB although some may argue M1 network reliability but come on, not happy feel free to port out.
Second, contractless meaning you free to jump over any best deal instead of lock-in 2yrs. This means greater flexibility and indirectly more saving
Third, you have CIS, a discount that not everyone have. It will be fair to use the National rate- $68.In addition, no free caller ID for non CIS. Even if CIS only for new/port in or specific companies. For recontract, still have to add $5 every month.
Sorry but its not a fair comparsion. Some companies CIS can be as high as 50% which make XO168 as cheap as XO68.
There is no 5G SA on Singtel network for Sim only for fair comparison. What are you blowing?