The world is crazy or OpenSource just do not advertise

This story happened to a friend, further from his face.

On my site I posted the assembly OpenStore .
Created an advertising campaign, threw 300r on it.
Campaign ads: "Online store for free"
Here are the last two letters from the correspondence:
I:

You did not answer my question, I will repeat it again:
What is the object of advertising in my case?
CMS Drupal is a free CMS which is freely distributed.
And please answer me in Russian, and not abstract extracts from
Code. Otherwise, this correspondence will continue indefinitely.

Regards, Alexey.

')
POISON:

Good afternoon, Alexey!

Any software, including distributed in the public domain on
free of charge, has its author (developer) and is
copyrighted object.
Promotional materials can not be accepted without providing documents
confirming the right to use the corresponding (advertised) result
intellectual activity, and a signed guarantee letter.

Before the start of advertising (the object of which is advertised
result of intellectual activity) Yandex has the right to request from
Advertiser’s document (copy) confirming the right to use
corresponding (advertised) result of intellectual activity.

In connection with the foregoing, for the placement of this advertising campaign to us
you must obtain documents confirming your right to use
materials (for example, the contract) and a signed letter of guarantee (if
If necessary, we will send the sample).

- Sincerely, Irina Kazak
Commercial services support service

Full correspondence archive www.drupal.ru/files/hi.doc