Y H.

Here's my breakdown:
Is it Cheap? Yes. / Is it a scam? No.
I've read a lot of reviews about getting fake and used codes. It has never happened to me (I have spent over 7k$ on this website already) but I won't say that it won't happen once in a while. It happened to me on other sites that had better reviews and so far this is the cheapest and most reliable one I found. The prices and fees are a tad bit cheaper than other websites that sell the same thing. Also, variety is good.

It the delivery fast? Sometimes.
The code delivery is fast, although sometimes they need quite a long time for processing and verification (probably a few hours to 2 days). If the items got out of stock and you paid for it, they'd refund you by adding credits to your offgamers account for future purchase, OR not always but sometimes they restock in a few days. Also, the codes are not sent via email, instead it is in their website, order section, and the order # is a link and the code should be in there unless it's a direct top up.

How is the stock?
The stock of the cards are usually pretty good and plenty for hundreds and thousands of people to buy. There are times though, that the cards are out of stock for over a month... well, this just gotta deal with it and find alternatives until they come back.

What is up with the ID verification?
Of course, there's also people complaining about the website asking for ID upload. That is something almost every game card selling website ask for to verify the payment card owner and the identity of the person buying, it is only a one time thing.

Issue?
There is a monthly purchase limit and up to now I still have no idea how much is the limit. The only way to bypass the limit is to pay via over the counter options such as western union... which is quite annoying sometimes, especially when your country's WU doesnt allow online payments.
Another issue is with contacting the support team. Other than via email there is no other way to contact them.

Overall?
A pretty good site for cheap cards. Reliable sellers, but not always perfect of course! Sometimes just gotta be patient with delivery times, and out of stock items.