Being the author of your learning content, it’s up to you—most people don’t care who wrote or devised the material, they just care about being able to take advantage of it. If the idea of somebody else taking credit for your ideas, or even monetizing them, ticks you off—as painfully obvious as this sounds—make sure people are able to find you.
Put your name and email address everywhere, make yourself findable through social media and make sure your email address is updated. Make it easy for your learning content fans to find you, or the credit for that material you worked so hard on and are so proud of might end up going to someone else!