as our licensing page states, in order to contribute to
LibreOffice and be part of our community, we require a
dual-license of MPL/LGPLv3+ for contributions, which gives
everyone the benefit of the strong rights these licenses
grant. From time to time, depending on the specific case and the
quality of the code, we may use and merge other licensed pieces of
code with compatible licenses. We examine each case, depending on
its merits.
In theory, code under a triple license is just as acceptable. In
practice, however, TDF has hundreds of affiliated developers
working as a team together, doing the actual code review and
acceptance work. There is a spectrum of developer opinion on your
nurturing of a competing project. Many core developers may be less
inclined to invest their time into significant, active assistance:
mentoring, reviewing, finding code pointers, merging, back
porting, and so on, for functionality that will not provide a
distinctive value for LibreOffice.
So, while there may be many possible acceptable variations of
inbound license and contributions, there are likely relational
consequences of those choices that are hard to quantify. Having
said that, all developers who want to contribute constructively to
LibreOffice are welcome in our community, and we have a high
degree of flexibility to fulfill their genuine needs. The best
thing to do is just to point them to our developers list.