There are three ways to land a sponsored post opportunity:
Free shipping: While exceptions exist, most days you can get free shipping when you use a RedCard. Some items are considered add-ons and require a $35 purchase to get free shipping.
Selling products. If you make any sort of product, you can sell it online. Consider using Shopify or Etsy for handmade or vintage products. Consider Amazon and eBay for other types of products, like books or inventions or wholesale items. You can also create your own e-shop but you must market it. Learn about SEO so that your website shows up high in Google searches.
Educational videos. Making educational videos and selling courses on sites like Lynda or Coursera allows you to make money with the knowledge and skills you have. Popular niches on these sites include coding, crafting and entrepreneurial tips and skills.
The trick is to find properties below market value (BMV) by avoiding estate agents and instead flyering your area with your contact details offering to buy houses. Then approach investors with a no-brainer offer to pass on the details of cut-price property in exchange for a % of the sale value.