IanCP - 11:15 pm on Mar 21, 2010 (gmt 0)

Good for you mate. Well done.

I am however, earning this money primarily through one hobby site

Twelve years later I'm still here.

be it a change to Google's business model or to competition.

It's the latter that will affect you. Twelve years ago I was largely alone.

Today?

That's life and totally beyond your control as indeed Google is.