My first results in Google are...
Yes, you're right. These are mostly design firms with Alexa:
polkadotdesign.com - 115,100
polkadotjewellery.co.uk - 2,304,980
polkadot.it - 2,403,386
polkadotchallenge.co.uk - 5,662,542
polkadotpr.com.au - 5,047,055
polkadotdenver.com - 8,488,438
polka.com.au - 10,569,949
polkadotgallery.com - 5,511,307
but also:
polkadot.pl - 334,810
I must admit it can be also design related traffic. This is a good evidence now concerning the first address you gave. You're right. Varchar knows where this traffic originates from and what is his Euro/click.
Still remember, that polkadot.pl is number 1 in Google as I've written above.
Also, optimizing for 'job' on Sedo is not so risky.
And I still remember

, that Polka means just 'Polish woman' what you can't exclude from searches!
If there is no polish traffic than let me apologize you for my too fast reaction giving some DNF$ as a sign of my good will
