The thing is that this doesn't at all apply to scamming on Sythe. There are very real repercussions. There have been cases where we have also contacted real life authorities. It doesn't come without risk at all. The people who scam are going out on a limb that nothing will come of it, when there is very real potential for them to be absolutely wrong.
As for the ban rate - like someone mentioned previously, you'd be shocked at how many people we ban just for ban evasion. Scammers on here are honestly, for the most part, recycled users. There are a lot of frameworks in place on the site to prevent people from returning, but they're not perfect. Those mechanisms exist because of that recurring threat.