It's entirely up to you.
If you're into browser/strategy sort of games, then this is your cup of tea.
It's all server-side, but this exploit seems to work.
And it provokes all needs for the games.
Considering like 100goldmarks costs ?10.
I'm able to give myself 9mil.
Goldmarks are used for; Supplies (main part of the game) - speed up production, edit and reconfigure units etc..
Basically goldmarks are 'hacks' in the game, hacks that are legal and you can purchase.
Of course, with my exploit, you can win a game with ease.
Check it out to know what I'm on about.