Our sign-up process is the same as any other vBulletin forum. It is not different. You need to enter your birthday on every forum because of United States regulations that prevent children from joining web sites without their parents' consent. Sorry to inconvenience you but we have to follow regulations.
We require users to sign up to buy the software, because well, you need access to the Members Area in order to download it, and we need to have an account to give those permissions to. It's not like we're mailing something to your house - you need online access to the item you've purchased.
We do have a Privacy Policy. As with every vBulletin-based site, it is the "Privacy" link in the footer of every page. However, it seems the URL was broken when we moved servers, and I thank you for bringing it to my attention:
https://www.vaultwiki.org/pages/Info:Privacy-Policy
I'm sorry if you find the word "Oops" offensive. We figured it was better than "vBulletin Error", which is what the standard phrase is on vBulletin forums.
Sorry if we can't please everyone, but we only require you to enter the information we absolutely need in order to create an account for you and follow regulations.
Aside from the broken URL which is now fixed, really the only issue I can agree with you on is that the "Oops" even shows when something is a success. I will look into that.