Buy the Voucher Club under "Account".
If you pay RM25 for 1-month voucher club, you will get 20 discount vouchers (and 4 free shipping vouchers) over 4 weeks.
Please note you can pay 5 times only per month to a Unifi account. (Not possible if you want to use all 20 discount vouchers on the same Unifi account), you can pre-pay your Unifi account, you don't have to renew Voucher Club monthly but only when you want it.

Read https://forum.lowyat.net/topic/4766583/+16000
#16006, 16007

Another way, click the big prosperity sales big banner, then click the calendar button on the top right area, then scroll down to 6 Jan, there is a voucher club.

Or this link
https://s.lazada.com.my/s.3ETVQ

https://s.lazada.com.my/s.3ET4Z

Your version is the beginner half baked version, not much usages but should be able to easily grab few Hero voucher (each one can save RM6), so at RM10 cost it's still fucking worth it.

Hero voucher can use for unifi, but unifi is limiting to 5 payment per month, so you can't spam all the hero vouchers there either.

If you have Sialcon bill though, that one can pay multiple times per month with no issue, so you can spam all those daily hero vouchers there.