Why some courses Badges, Certificates and Points are awarded, but some courses Only badges, points are awarded in MEC?

Why some courses Badges, Certificates and Points are awarded, but some courses Only badges, points are awarded in the Microsoft Educator Community, MEC?

Step 1:

Training- certificate- courses

https://education.microsoft.com/badges-points-certificates/certificates

Step 2:

There is movement of the courses from the MEC platform to the Preview platform.

The courses are done on the preview platform, only badges are rewarded.

(So we are assigning only the badge for the course done)

a). MEC platform will be transitioned to the Preview Platform.

As per the transition of the courses from the MEC (https://education.microsoft.com) to the MEC preview (https://preview.education.microsoft.com)
only the badge is assigned on the completion of the course-https://preview.education.microsoft.com/course/d2468821/overview.

b) Currently, MEC platform course- Badges, Certificates and Points are awarded.
Sample image of the MEC course is attached. 

c). Preview Platform course- Only badges, points are awarded.
Sample image of the preview course is attached. 

The End