The prices of Broadband connection has hit a new low! Despite being a 12 month offer during the 24 month contract, it is a glimpse to the future of Broadband prices. I would link the pricing to the demise of the dial-up services as the cheapest plan is probably lower than S$20 in the near future.
Meanwhile, existing customers would not benefit from the promotional pricing, unless your contract lapses and you get the offer by recontracting. So if you ask me, its like buying stock in the financial market when you hope it does not fall any further after purchase.