Now that GrabPay and GPMC is not allowed on AXS, what other hacks can be used to pay SP Services, electricity, insurance premiums on AXS app (or AXS stations)?

No other way now. Although there is a service (cardup) out there which you can pay them a commission to make your transaction eligible for rewards.

Dont think there is any method which allows you to pay the bills via AXS as the intermeditary. AS many people have commented, use cardup though there is a fee of 2.25% to pay

Grabpay MasterCard doesn't work and I don't think Youtrip is accepted either :(

SP services- 1% on posb everyday card. If they are big amounts, you can try cardup or ipaymy but there's a transaction fee of 1.9% - 2.6%