How to get free radiant points?

Hello there, I'm curious about something related to earning free radiant points. Can you please elaborate on how one can go about acquiring these points without having to spend any money? Are there any specific tasks, challenges, or promotions that users can participate in to accumulate these points? Additionally, are there any limitations or restrictions to keep in mind when attempting to earn these points? I'd appreciate any information you can provide on this matter. Thank you in advance for your help!