ASoggyRat

Looking at Nexon's billing page they do accept paysafecard as a prepaid card method. In the UK you can buy paysafecard credit in various amounts from £5 upwards from any paypoint retailer. Some stores may not even know they can sell paysafecard from their paypoint machine because it's not commonly asked for but all of them are able to.

It's unlikely you were playing during the release of the RED update, but they added in a new system called 'Open Advancement' for the explorer type classes.

What this means is that once you reach level 101 or higher, you have the option to pay a fee (in mesos) to change your job to one of the others in your class type. So for example if you were to level a Spearman and decide you don't like Dark Knight when you get to it at 4th job, you could change your job to Paladin or Hero whenever you want.

This works for all explorer type classes, but you can only change within your basic class, so for example magicians can only change to other magician explorer jobs. The cost of changing goes up each time you change and the higher level you are, but it's a good way to try our different classes if you decide you don't like your current one or want a change.

So for example I have advanced to Fighter, then advanced more to Crusader. I can switch to Paladin when I'm about to commence my 4th job advancement?

Another thing, where can I find class guides? Like the correct skill and stat points to distribute to and all? Thanks!

There's a short guide on Open Advancement on the wiki here. You can change to any other class once you're level 101+ and have completed the 4th job advancement, and change back at any time. Stat points for all warrior type classes want to go all into strength, secondary stat requirements were removed a very long time ago, and there's an auto assign button now to assign your stat points.

As for skill points, you may be able to find out by googling "maplestory [class] skill point guide". My personal way of assigning skill points is to put 1 point into every attacking skill at each job, max out passive skills first, and then buff skills and attack skills last. Most jobs get enough skill points to max out all of their skills at each job anyway, the only thing you really have to look out for is if the tooltip for a skill tells you that you need it at a certain level to learn another skill at a higher job. The text that tells you that you need to invest a certain amount of skill points into one skill is orange when you highlight the skill, so it's fairly easily noticeable.

It's unlikely you were playing during the release of the RED update, but they added in a new system called 'Open Advancement' for the explorer type classes.

What this means is that once you reach level 101 or higher, you have the option to pay a fee (in mesos) to change your job to one of the others in your class type. So for example if you were to level a Spearman and decide you don't like Dark Knight when you get to it at 4th job, you could change your job to Paladin or Hero whenever you want.

This works for all explorer type classes, but you can only change within your basic class, so for example magicians can only change to other magician explorer jobs. The cost of changing goes up each time you change and the higher level you are, but it's a good way to try our different classes if you decide you don't like your current one or want a change.

I couldn't honestly tell you about the free VIP coupon, I'm not sure if we had that over in EMS.

You're correct about their being different clusters. Explorers are the classes you probably know from a long time ago, Cygnus Knights have their own variant of every class (warrior, bowman, magician, thief & pirate) and Resistance has their own versions of everything except thief. Whatever you choose it may also help you get to know the newer game better, so you could always go back to one of your other characters at a later date once you have a better idea of where you're going and what to do.

Edit: Xenon is Thief & Pirate, therefore the Resistance does have a thief class.