You can earn money through Pinterest by 5 ways
1) affiliate marketing 
it is one of the best way to earn money by affiliate marketing , you can use these methods to earn like you use amazon affiliate program and then find the creator who is using the same product and put the  video on the pinterest along with affiliate link

2) Management agency
you can earn money by managing the others pinterest pages , if you don't know how pinterest works first learn how pinterest works and then make some accounts , you can also use some ai website for generating pins ,  when you gather some traffic on your pinterest so start approaching the other business owners to buy your service. you can approach other business owners  by instagram , cold emailing, big businesses
like hey i can help you in diversify your reach through pinterest , show the results

3) Sell products
you can use pinterest for selling digital products and physical products  , you can also do dropshipping on it , like you upload the product on pinterest then add the link of your shopify and etsy 

4) Services 
You can offer them pinterest seo and ads services once you have good portfolio you can message the pinterest account holders and tell them that you can generate traffic to their account by optimizing SEO , You can find a lot of services on the Fiverr related to it  

5) Email List
you can use your pinterest to build your email list and once they enter their email , you can sent them digital products, affiliate links and a lot of things.