Yes. In the US, UK, Europe and many other parts of the world, you are required by law to disclose a sponsored post. The easiest way to do this is to simply include #ad. We strongly recommend you include #ad when posting so your audience can easily identify branded content.
Mi&Co charges brands a minimum 30% commission on top of any post they purchase. For influencers, Mi&Co is a completely free service. For more information on our pricing, please visit our pricing page.