Reading the brochure u will understand.
The more u spend the more shopee coins u will get.

Oh ya make sure your shopee account phone number and your CC receiving OTP is the same phone number, else u wont get coins.

Spending on 28th gives highest coins iinm.

Topup ewallet no coins

use paywave whenever possible (2X coins everyday, 28th get 4X coins).
if you pay using PIN method, then only get 1X coin.

ewallet topup = No coins
Utilities / government services / insurance = 1X coin

Every Wednesday, Maybank offer RM15 off (min spend RM150) for Lazada purchase. Not applicable to bill payment and digital goods. Key in MBBWED during checkout.
Every Tuesday, Maybank offer RM20 off (min spend RM150) for Shopee purchase. Not applicable to bill payment and digital goods. Key in MSCC20 in voucher column.