Mike stumbled upon a very interesting use of a typo domain in the .UK extension. If you go to ebay.c.uk like Mike did, or any domain where you leave off the o in .co.uk, you get a page that explains that the company behind the domain is Claims.co.uk. The company has apparently done a lot of work helping charities and they are also owners of C.co.uk and the matching C.uk.
So what the company is doing is using a wildcard on any typos and bringing users to this landing page, the page explains who they are and what plans they have for utilizing C.uk.
They get a fair amount of traffic, from the landing page:
How many people do this?
Quite a lot actually! We get over 100,000 unique individuals a month visiting our site. This adds up quite quickly, as each year we have about 1.37 million people visiting us, or to put it better 2.1% of the entire UK population. That’s enough to fill Old Trafford over 18 times!
It is nice to see they are focused on a charitable mission, with 100,000 visits a month they can probably make some kind of a difference.
Best of luck