https://nadexrule.wordpress.com/ https://www.nadex.com/sites/default/files/pdf/notices/notice_848.pdf
It's a private business, they set the rules. I don't get your point. If you don't like it, don't trade with them-- surf
Nadex is owned by a bucketshop, and pays people in third-world countries $0.08 per post to mention them in trading forums, "to have their name seen" and for (questionable) SEO purposes. (Some forums allow it; other routinely remove the posts.)