A yellow pages site is begging for backlinks

Well, they’d give some in return, unlike a elsewhere a few months ago (German). Quote from the mail (my translation):

“You receive this e-mail because you have been registered in our yellow pages site web2.cylex.de for some time now.

…but not voluntarily…

We’d like to offer you one or two backlinks as long as you set one of the following link to us:

<a href=”http://web2.cylex.de”>Branchenbuch</a>
<a href=”http://www.cylex-telefonbuch.de”>Telefonbuch</a>
<a href=”http://www.cylex-review.com”>Firmenbewertung</a>

[…]
The address of your homepage is already stored in your file, however the link is currently not treated as such by search engines (masked with Javascript). If a link exchange is accomplished, the link will be demasked by us and considered a real backlink by the search engines.
[…]

If you don’t want to receive further e-mails from us, please open the page […] to unsubscribe.

I never wanted e-mails from them, because I have never been in this yellow pages site which apparently is filled automatically from who knows what sources.

Thank you for your attention,

Your IKM Team

IKM Internet Kaufmarkt GmbH
[…]”

Since even if there are loads of useful entries in this cylex yellow pages site (ignoring a readability with needs for improvement thanks to USAGE OF CAPITAL LETTERS in some places), I’m sure that there must be numerous useless ones, too, because:

• 2005, I was listed with an old private address that had been invalid for years, mixed up with phone number and description from some company.
  
• Late 2006 (I wrote about it here), they offered a free route description for the entry that this is about now, too: the private site of my Abitur class (German kind of university-entrance diploma) (rmg91.de), entered as company “RMG 91 CHARAKTERISTIK” with my current private address (without my name).
  
  For “keywords, field of company’s activity”, their bot didn’t find anything more, so they just repeated the assumed company name.

Update: You’ve got to hand it to them that they reacted to my mail within less than 45 minutes and removed this entry.