And also send letter to FCC to encourage repeal Net Neutrality, try to make use of API copyrightable, try to steal Android revenues from Google with debatable reasons, and so ones... That is for the company in general, but for the customers of their database, there is also much to say.
By using the DB you have to deal with the company.
By giving a grant to a company that is (apparently) more ethical will signal what kind of behavior you encourage, hence choosing to work with MariaDB over OracleDB.