I wish DO include in their answer the definition of abusing, in my case, I may call the DO API to create or delete droplets everyday to reduce the costs, (Elasticity), I have a Saas service.

Hey there! Updating a DNS record three times per hour should not cause any issues, are you receiving any errors or slow-down requests? Requests through the API are rate limited to 5,000 requests per hour and/or 250 requests per minute (5% of the hourly total).

For more details, you can review our docs here:

https://developers.digitalocean.com/documentation/v2/#rate-limit

https://developers.digitalocean.com/documentation/changelog/api-v2/add-burst-rate-limits/

If you have any other questions or seeing something weird, you can open a support ticket so we can take a closer look!