Based on the
forum rules, referral code (referral link) spam is not allowed - fair enough. But if your post is on-topic, has good, relevant info and you include a referral link, that seems to be fine.
Definitely you give a new insight, but I don't expect people will include their referral link to their posts because this will increase the chance their posts might be deleted. Some people are also skeptic when they see someone post contain their referral, they think those people only want to promote their referral even though they post on topic and high quality.