From build 6330 Opera changed its license, expressly forbidding to
redistribute Opera for money and expressly allowing for Opera to be
freely included in a distro package repository:
http://my.opera.com/ruario/blog/show.dml/108705812. LICENSE. Subject to the terms and conditions of this Agreement, Opera hereby grants
Customer a limited, non-exclusive, non-transferable, non-sublicensable license: (i) to use
the Services and to install and Use the Software supplied to Customer hereunder, as
installed on your personal computer, including your laptop, desktop or on computers within
Customer’s organization; and (ii) to reproduce and distribute the Software without
modification, provided that any such reproduction or distribution of the Software by You:
(i) must be in an application repository for a desktop Open Source OS distribution
(expressly excluding distribution for embedded Open Source OS); (ii) must be made available
free of charge for end-users; and (iii) must be subject to and distributed with a copy of this Agreement.