Re: Bug#639916: spread: license wackiness
On Wed, 31 Aug 2011, Francesco Poli wrote:
"3. All advertising materials (including web pages) mentioning
features or use of this software, or software that uses this software,
must display the following acknowledgment: "This product uses software
developed by Spread Concepts LLC for use in the Spread toolkit. For
more information about Spread see http://www.spread.org""
What you quoted looks like an Obnoxious Advertising Clause (OAC), a
GPL-incompatible restriction, but one that has traditionally been
accepted by the Debian Project as compliant with the DFSG (even though
recommended against), AFAICT.
Unlike the original BSD 4 clause license this adds "or software that uses
If I interpret this broadly (all software that uses this software must
display the sentence) it's non-free, since it imposes conditions on
non-derived software that happens to use it. Even if I interpret it
narrowly (all advertising materials mentioning software that uses this
software, must display the sentence) it imposes conditions on advertising
for non-derived software.
If I interpret the addition as meaning "derived works" the license is free
but the wording is redundant.