Wenn ich im englishem Forum unter werbefreiheit schaue, kommt da auch nur der deutsche Text.phpbb-funktionen-technik/unser-forum-ohne-werbung-t33964.html
Hier mal das ganze auf english.
You want your forum to be free of any advertisement, but you don’t want to pay all the costs?
We offer you a possibility where your users can help you to finance an advertisement free forum.
How does this work?
Your users can use our „AdFree-Coins“ system. They have the opportunity to spend a minimum amount from 0,50EUR for your forums free advertisement. Every € cent that is donated to your account will be recalculated in AdFree-Coins and automatically be used for your advertisement free forum.
Use this Demo Link to see how it looks like.
To use this gadget you first have to activate the "AdFree-Button". You only need a graphic that is linked to the payment page. You have to paste this graphic code into “Administration Control Panel -> General -> Board settings -> Graphic URL for advertisement free forum” and the link will appear in the footer of your forum.
How the AdFree-Coins are used:
After receiving your donation, the AdFree-Coins automatically will be credited to your forum.
Your forum will be advertisement free when you reached 500 Coins. If your forum receives more donations within the free advertisement period, they will be changed into AdFree-Coins and added in days to your Forum. Coins that will be left over, will be calculated into minutes and added to your Forum.
This is how it looks like: