You do it to increase the accessibility to your product. Facebook and Mint don't want you going to other services, they profit because your data and attention i

You do it to increase the accessibility to your product. Facebook and Mint don't want you going to other services, they profit because your data and attention is with them. If they can take advantage of platforms like mobile to engage you even more, than thats fantastic for their business and it increases the switching cost of leaving them.