Anyone know how Grab reward pts are counted?

Is Grab pay available in msia? Or it is non existence..

I can see it is from here.
depends on the rider is "grab car / taxi" or "just grab".. and also depends on your membership type.

https://www.grab.com/my/grabrewards-faq/

I am trying to maximize the rewards points.
Is paying with grab wallet compare to credit card that is link to grab.. any difference between this 2?
because i tot Grab tried to encourage ppl to use their Grab wallet, so paying with that can earn more points? But apparently i can be wrong.
That's why try to ask whether anyone know better here.

Last time i asked about rewards points..
But still dont really understand how the points are counted.

Always travel the same distance, same pick up point and drop off point, same payment method,etc.
But seems sometimes can get higher rewards, some normal.
How is it calculated, and how can i maximize it?

Are u saying justgrab will earn more points.
But i think my case, i always book taxi for claiming the hardcopy printed receipt. And some times the points are higher, sometimes low.