I do this a lot whenever I have my 5-year cycle of migrating accounts. If I have lost track of and forgotten entirely the purpose of an account I had once made and know it is not essential or required, it is gone.

Unfortunately, there are services and places out there online in which they do not allow you to delete accounts. I wish this would be a federal law of some kind because it would lessen your footprints online. It is bad practice and I automatically label them as data farms because really, what reason do you have to not allow people to delete their accounts? You're setting people up to be collected in data breaches and therefore your data falls into the hands of someone you wouldn't want to have it.