HSBC Credit Cards have a promotion whereby:
The new HSBC rewards programme allows cardholders to purchase Rewards Points in blocks of 1,000. Every 2,500 Rewards Points = 1,000 KrisFlyer Miles.
HSBC allow cardholders to purchase 1,000 Rewards Points for S$8.
2,500 Rewards Points= 1,000 KF Miles= $20.
There is also a S$42.80 annual mileage transfer fee.
Essentially, you get to travel at discounts over SIA's published rates.
Award Tickets are also more flexible. You are able to change dates, flights, so long as the flight change is a same tier city (e.g. 29,750 KF Miles gets you one way to London, Manchester, Paris, Milan-Malpensa etc)
Take for example,
SIN-LHR ex. SIN:
Flexi Ticket: $1,710 + $683 taxes/surcharges = S$2393.40
Award Ticket: 60,000 KF Miles (after 15% online discount) = $1,200 + $683= $1,883...
...
Have you done this before and speaking from experience or are you just speaking theoretically?