How do i get Credit and what are the differences between member groups?

[cocolino]

The system is nice but it's also very difficult. I only get random 1-2 credits for a posted resources

 

[DIlwsi]

Guys can I ask a question.

When something says free download. But when I click on it, its says "Sorry, you need 10 Credits to download this resource"
How does this work, is it really free or do I need to pay 10 credits?

Just trying to understand how this works.

Thanks