I downloaded MariaDB 10.1.18 source code from https://downloads.mariadb.org/ (not from mariadb.com).

I compiled it with:

cmake . -DBUILD_CONFIG=mysql_release -DWITH_SSL=system

My build contains advertising for a company called "MariaDB Corporation Ab.":

Support MariaDB development by buying support/new features from MariaDB

Corporation Ab. You can contact us about this at sales@mariadb.com.

Alternatively consider joining our community based development effort:

http://mariadb.com/kb/en/contributing-to-the-mariadb-project/

In particular, the "us" is very troublesome. This is a bug, either that should not be there, and show instead:

The MariaDB Foundation is a non-profit incorporated in Delaware, USA

funded by both corporate sponsors and individual donors. Please

consider supporting MariaDB Server development donating to:

https://mariadb.org/donate/

Alternatively consider joining our community based development effort:

http://mariadb.com/kb/en/contributing-to-the-mariadb-project/

If there is some promotion/sponsorship deal between the MariaDB Foundation and the MariaDB Corporation A.b., and that helps paying the releases, this should be disclosed (it is illegal in many countries to promote products without disclosure). I am ok with ads if they bring value to the product.

Also, there is no problem with MariaDB Corporation releasing their own packages advertising its company (Oracle does, Percona does), but it should be done by themselves.