It does not seem to be clear what the difference is, because of the language of the CFAA. Which of these can be categorized in each of the categories above (in increasing order of severity)?
- Using a fake name/birthday which does not impact eligibility to use the site (like if I use the name John Doe on Facebook)
- Using a fake name/birthday which would impact eligibility to use the site (like if I was 12, but wanted to use Facebook)
- Creating multiple accounts with a site that does not allow for this to impose usage limitations.
- Using multiple free trials without providing inaccurate information.
- Using multiple free trials by providing inaccurate information.
- Using an ad blocker.
- Making a profit without buying the "commercial" version of a software (e.g. Unity or Oracle).
These are some examples, but there are many more cases. Note that in most cases, a website owner would probably not sue (they could sue for anything, but it would not be worth it in most cases).
I did get an answer at Is inappropriate use of a website solely a civil matter, or will it extend to criminal matters as well?, but it suggests that such actions are in a legal gray area due to the vagueness of the CFAA.
I got another answer at What distinguishes civil offenses from theft of services?, which is somewhat helpful, but I would still like more information.