Whoa whoa whoa. I didn't expect so much activity and inquires after the inactivity before. I'll try and address each one of your concerns one by one.
How have these accounts been obtained?
Just like any other account seller, these are cracked. However, unlike most sellers, the reason why these accounts are "full access" is because I've gone through each and every one of the accounts and thrown away all the accounts that don't meet these two criteria:
a) Security questions have not been filled out, allowing for you (the buyer) to change them and obtain full access to the accounts.
b) The account has not been active for a considerable amount of time, minimizing the chance of it being "reclaimed".
only a "3 day guarantee"... is that time it takes for security to catch on? Why not longer?
If you're talking about the "lifetime guarantees" sellers nowadays have been talking about, I don't believe in such warranties, which are blatant lies. You can't really expect them to refund you and give you a fresh account 3 weeks later, let alone 3 years. Those kinds of promises are done by amateurs, people looking for a quick profit and then quitting the business after those people who want a warranty fulfilled come streaming back.
Can you give any proof of legitimacy?
I have no idea what you're looking for. Can you elaborate?
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TL;DR: Cracked accounts, but handpicked to minimize chance that you will need to redeem your warranty from me (which I will gladly do, if need be). 3 day warranty is
not because I want to scam a couple dollars from people and run away as if it was worth it[1], but instead, it's my way of giving a sincere warranty without giving an unreasonable "warranty".
[1] And if you really think that's my malicious intent here, you should realize I would make more money building a reputable foundation here and continuing my business.
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I hope that cleared up your questions. Let me know if you have any more inquires or concerns, I'll be more than happy to answer them.