Some companies are fully betting on a single third-party API. When this third-party suddenly changes it`s terms and conditions, or even closed it`s API it turns your software useless. If you have a startup betting on a single API and App (or experience) your business suddenly has no products.

Company for sale

If this third-party wants to buy you, they can even destroy you by blocking you access to their API. This means the price of your company rapidly drops to zero. This means you are giving another company full control of your short-term credibility. If they want they decide your price and they can buy you.