I'm failing to see how this could be useful to anyone.

It's a form of warrant canary?

Me too. They could have blacked out some of the digits while preserving the milliseconds joke.

I would agree. If you're saying this is the only data I have, give it in the exact form you have it in.

Not only all the records that they have, but it proves that the data isn't meaningful to de-anonymize someone. If they had to redact it we would wonder why and how that information would be useful.

The standard is that you "must produce it in a form or forms in which it is ordinarily maintained or in a reasonably usable form or forms."

It's probably fine here, but if you store it in binary, you should probably parse it into something human-readable.

The snark is publishing it in the blog post not blacked out. As a side effect the account may or not be warned by this. Not sure, if it’s legal to do so, in the US.