Red Hat Policies Regarding PostgreSQL

From ​http://www.postgresql.org/download/linux/redhat/ comes the following
quote:

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Due to policies for Red Hat family distributions, the PostgreSQL
installation will not be enabled for automatic start or have the database
initialized automatically. To make your database installation complete, you
need to perform these two steps:

service postgresql initdb
chkconfig postgresql on

or, on Fedora 19 and other later derived distributions:

postgresql-setup initdb
systemctl enable postgresql.service
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To which policies are they referring? Licensing, security, or other?​