Ask HN: How are platforms like Buffer and Hootsuite allowed to exist?

Companies like Meta and LinkedIn have taken a harsh stance against programmatic access, and scraping of their platforms. How is it that these companies like Buffer and Hootsuite can exist when it seems that what they do is directly a violation of the terms of use. For instance if I were to create a program to schedule my social media posts for some point in the future, wouldn't I be at risk for Instagram disabling my account?