yes issue with reversal is worse forex rates.
Amaze only can link mastercards and it converts everything to online in SGD. So only 1.5% on standard chartered unlimited. Can also link to Citi rewards MC, where 10x points for max $1k monthly spend can be converted to 2.3% rebate; travel related like hotel/flight/train/car rental excluded though. Can also consider BOC Qoo10 world mastercard for 3% rebate in terms of Qoo10 money. Or Maybank Family and Friends for 8% and HSBC Premier mastercard for 5% in selected categories. TnCs for min spend/rebate cap/ exclusions apply.
Yes min $1500 for Amaze rebate can be in a month.
Quite easy to redeem Amaze rebate. Just need to select Amaze wallet and use Amaze card for purchase.