Actually, I followed your link to the Wiki BBCode web page and this is what it says about Hyperlinks.
What I suggested is standard BBCode!
I am trying to inform those who post on Carcassonne Central that there is another way to post a Hyperlink. If you post a Hyperlink on the Board Game Geek website, this is the first page you see when you click their hyperlink icon
After filling in the URL you want to link to, click next and this is what you see
If you want to see alternative text, just type it in and when you click "Add Link" this is you final result.
I was using curly braces in my TEXT only because I'm not sure how the use of random square brackets in the post would react and display.
Lets look at this from a Strictly Carcassonne Central viewpoint
When you click the Insert Hyperlink Icon, the only thing that is put in your post is the first line with the Cursor blinking between the two URL commands.
If you want the full path to the URL you are trying to link to to display in your post, just insert your URL between the two commands.
If you want some optional link text to appear in your post:
Move the cursor back one space, before the first command closing bracket
Then type in your hyperlink preceded by an = sign
Then move your cursor back to the position between the first closing bracket and the second open bracket
And type in the Custom Link Text that you want to appear in your post
Again, this is all standard Wiki BBCode. But, Carcassonne Central does not make it easy to do it this way, so I thought it would be nice to show everyone how to use Custom Link Text.