I downloaded MariaDB 10.1.18 source code from https://downloads.mariadb.org/ (not from mariadb.com).
I compiled it with:
My build contains advertising for a company called "MariaDB Corporation Ab.":
In particular, the "us" is very troublesome. This is a bug, either that should not be there, and show instead:
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.