I am not sure if it works for EVERY single domain, but I do know it works .com, .net, .us, etc..
These domains last 1 year but you can do it again and over again on different accounts so it's pretty much forever
3 VOUCH COPIES ARE AVAILABLE TO HIGH REP USERS, PM ME FOR ONE. Must have 50+ rep aswell as 1k+ posts and be a well known member overall, if you don't exactly meet the requirements but are close, we can work something out. (Please vouch after you get one)
To use this method, you need at least $10 USD in your verified PayPal (must have a CC/bank account connected to it).
[READ-ONLY]
I don't have $10 USD in my PayPal right now. This method is a common method that is exploited on other sites. I've done this before on a VPS host, similar to the one this website tells you to exploit so I can almost guarantee this will work.
Content 10/10
The steps were simple and straight forward. I got the text copy so it didn't have any design whatsoever but the steps were explained enough to be able to do this without any problem. There were only 7 short steps!
Language 10/10
Easy to understand for all users who have some English knowledge. Not much else can be said in this category.
Price 9/10
For some, $3 can be pricey but considering you are getting a $10 domain for free for the entire year, it isn't a problem.
Overall Rating 9.5/10
This method could become saturated if too many people use this method and exploit it.
When you sign up for this, currently the .com domains are free for the first year! Afterwards, they are $0.18
The downfall to this is you need to either pay for the next year or get a new domain which can be a bit annoying if you are a website owner, having to constantly change domain every year.