Hello and welcome @Lukasogier,
Sharing free coupons for your course should not result in a ban from the platform. Here are detailed guidelines on how to share coupons and referral links. If you have any concerns, I recommend contacting our Trust & Safety team at policy@udemy.com so they can clarify any doubts you may have about this.
I'm tagging @AntonReif in this post since he recently had a similar question. 🙂
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