What is NX cash

Nexon Corporation (Korean: 넥슨) is a Korean Gaming corporation, and a developer of online games and MMORPGs.

Commonly referred to as 'NX Cash' or just 'NX', the NEXON Cash system was one of the first systems to use the Virtual Asset Sales(VAS) model. The Nexon Cash system was first introduced in the Korean version of MapleStory. The NEXON Cash system allows users to purchase NEXON cash with real money.

Although playing the game is free, character appearances and gameplay enhancements can be purchased from the "Cash Shop" using real money.

Cash Shop is a virtual shop where players can buy items using real money, so called microtransactions. Most Cash Shop items expire after a certain period of time. Pets, modeled after animals such as monkeys, dogs, cats, bunnies, pandas, and pigs, follow the owner around and can be equipped to pick up spoils dropped by enemies.

Real money trading between players is prohibited in MapleStory, and results in a ban. This includes trading mesos (ingame currency) with NX Cash Items (items bought with real money).

"FREE" offers, are not really free. Ask yourself these questions:
If they're giving it to me for free, how are they paying for it?
Answer: You have to give them something.
Question: What do I have to give them?
Answer: A lot.
* Your personal information - give them your name, email, home address, gender, date of birth, and phone number. This information is used to send offers to your email account, your home by direct mail, and your phone with telemarketers.
* Your credit card - you also are required to sign up for one of the offers they present to you. which involves giving them your credit card number. Offers like a Blockbuster online rental membership, DVD and music clubs, credit card offers, ringtones & horoscopes. They are paid a commission from these companies when you sign up. Companies will pay anywhere from $10 - $70 per sign up.
* Your friends and family - in order to qualify for the free item you have to get referrals from friends or family members to sign up AND request one of their offers.
However, there are certain sites that do not require all these information. There are online testimonials to prove it's genuinity though it is unproven if these testimonials are true. Here are examples of such sites (please add more if you can find them):
PrizeNobel: see link below
Economically speaking, this is a somewhat believable site. They are hired by companies to host surveys on their site, enquiring about their products. As such, these companies are able to improve the quality and design of these products, thus attracting more customers. From an internet source I have read that these surveys are "really long and those hard-to-answer kinds" (the person was recommending some sort of technique or programme to help answer the surveys faster). Because of this, some sort of motivation is required to encourage the average user to even attempt these surveys.
Without the completion of surveys, companies withdraw surveys and stop paying.
Result? PrizeNobel goes bankrupt and they don't make money.