Should I learn amazon AWS without earning a certificate?

Hello. So this opportunity just presented itself to me: https://www.freecodecamp.org/news/aws-certified-cloud-practitioner-training-2019-free-video-course/

However I have no way to pay the $100 exam for the Amazon certificate itself, thus not being able to earn a certificate. Still, is it worth the trouble of learning this? Maybe in the future I can buy one, but them I might have to review some concepts for the exam, but I can see myself using AWS in case I end up doing my own server for a game.

submitted by /u/___Galaxy
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