YES! According to FTC, anytime you create a “material connection” with a brand and post about their products, you must clearly disclose this connection with this brand in your review.
This includes: the provision of free products.
Bottom line: you must be clear that you got these products for free in exchange for your opinion.
You must do this for every product you receive on Octoly and everytime you post about a product. It’s not just about respecting the law, but also about being honest with fellow customers.