There was a period where I didn't keep backups of the data on free accounts, but people complained, so I added that.
I think it's a bit unfair to expect me to keep account data around forever for free, even after notifications that the account is inactive and will be deleted. Also, wasn't this more than half a decade ago?
EDIT: Also, your account isn't even deleted, only the pages are, so your username should still be there, no?
EDIT2: Also also, paid users don't get deleted, so something must have happened there. Maybe your payment method failed when renewing, or you didn't have a paid account? What's the username?
EDIT3: I found the thread:
You: Why did all my bookmarks disappear from my account?
Me: We only delete the links of unpaid accounts, as they take up too much space. We do have a backup export of your links I can send you, though.
You: Can you please? I will upgrade to a paid account if you restore my links.
Me: Sure, but it will have to be tomorrow, as I'm not at the computer right now.
And then what you posted above.
So it wasn't a paid account, this was seven years ago, your username wasn't given to someone else, and I didn't kill the service or lose your data.