I see. So here's what I know, neither version of the Kraken, nor the Pioneer can be CCU upgraded into, so the CCU dance won't help in obtaining those, only real money (new or in store credit) spent on them the few times they are available & after winning any F5 (refresh) battles in order to add them to your shopping cart.
As for purchasing creds, only actual UEC will remain in your account through the various waves of wipes that CIG will do periodically when required on the road to full launch. While CIG has been doing their best to stop wiping the aUEC for the past several patches, they are probably still going to wipe everything that isn't account bound a few times between now & then, and guaranteed to wipe everything not account bound at official launch. At which time, the only UEC that will remain to start with is that accredited to your account, which is gained through real money purchases of various packages or from purchasing UEC directly from CIG themselves, which I have never seen any discounts on in the nearly 10 years that I've been a backer of this project. You can tell how much UEC you have saved up currently on the RSI website when you click on your profile pic in the top right corner of the screen.
Sorry for any unpleasantness this info might cause, but I prefer to be honest whenever possible, even when the truth hurts. At least now you'll know what to expect.