Some questions

Today is the first time I had a look at this addon, even though I have been running vBulletin for a long time.

I am a bit shocked at the high price. I didn't expect an addon to cost almost as much as the forum software itself. Anyway, here are my questions:

1) Is there a place where I can see a detailed list of features.
2) Would existing links to forum threads still work? I have tons of those links.
3) Does Jelsoft have any plan to have a feature like vBSEO in future version of vBulletin, like vB 3.7?
4) Does it cost extra to remove the copyright notice? How much?
5) How does it run on very busy forums with 4+ million posts?

Thanks in advance for answering.