Okay, I agree with almost everything you said above, but this paragraph:
In the case of copyright, if you want to take a matter to court, you just go ahead and register before suing. Now, that situation isn’t as good as registering earlier, and in some situations you might be denied the best remedies, but it also doesn’t mean that you don’t own the rights and you don’t benefit from them, because registration is not the source of your rights.
…while perhaps true to some degree, is, IMHO, very misleading.
First, anyone who was told “if you want to take a [copyright] matter to court, you just go ahead and register before suing” would be getting very bad advice. I assume Ascenray knows, but for the sake of others here I’ll point out that copyright law provides that if a work has not been properly registered, you can only recover for actual damages. In most cases, properly registered includes filing within a set period, e.g., 90 days of publication. For unpublished works, it must be before any infringement takes place. Obviously, if you’re taking someone to court, it’s because you believe they have already infringed. Registering at that point will limit your recovery to actual damages.
However, if you had properly registered, you could recover up to $130,000 in statutory damages per infringement (i.e., per illegal copy made), plus legal fees. This is often enough potential return to persuade an attorney to take the case. Unless you have somehow released a huge hit song without registering it, in the vast majority of cases actual damages will not be enough to get a lawyer to even answer your call.
If you happen to have enough cash to pay for a lawyer out of pocket, you can sue the guy who made unauthorized copies of your unpublished memoir, and the court may agree with you that he violated your copyright. But the infringer’s lawyer is going to point out that you tried peddling the book to 20 publishers who rejected it, and that therefore your actual damage is $0.00. If the court agrees with that argument, that’s what you’ll “win,” and you’ll still be on the hook to your lawyer for tens of thousands.
I take it this is what you meant when you wrote “Now, that situation isn’t as good as registering earlier, and in some situations you might be denied the best remedies.” This strikes me as a rather extreme understatement.
And that is why I wrote that for all practical purposes you must register to obtain the full benefit of your rights. A right that can only be enforced by extraordinary personal sacrifice is not very useful.