I'm pretty sure if you use thread unroller, it'd still work. Just feed it the url of the first post of the thread and it'll make it readable. It doesn't require any login so it won't be relevant whether you have an account.
Sure, but that's an awful user experience. If you've got something useful, and long-form to say a _micro_blogging platform might not be the best place.
Totally agree, just saying if it's already there and you want to read it anyway, there are ways without making an account. Putting it on the blog would be better, ideally.