Looking at the Canonical CLA [1], you're right that it
allows Canonical the right to relicense contributions under any other license:
> 2.3 Outbound License
> Based on the grant of rights in Sections 2.1 and 2.2, if We include Your Contribution in a Material, We may license the Contribution under any license, including copyleft, permissive, commercial, or proprietary licenses. [...]
However, please note that my original comment [2] was asking for a CLA which prevents usage in a proprietary setting, while the project is under a permissive license like Apache/BSD/MIT (emphasis added):
> I've never seen an Apache/BSD/MIT project where the CLA (and only the CLA) prohibits commercial / proprietary / closed-source or any other use cases — if you have an example or two, could you please point them out?
[1] https://ubuntu.com/legal/contributors/agreement
[2] https://news.ycombinator.com/item?id=23365535
> 2.3 Outbound License
> Based on the grant of rights in Sections 2.1 and 2.2, if We include Your Contribution in a Material, We may license the Contribution under any license, including copyleft, permissive, commercial, or proprietary licenses. [...]
However, please note that my original comment [2] was asking for a CLA which prevents usage in a proprietary setting, while the project is under a permissive license like Apache/BSD/MIT (emphasis added):
> I've never seen an Apache/BSD/MIT project where the CLA (and only the CLA) prohibits commercial / proprietary / closed-source or any other use cases — if you have an example or two, could you please point them out?
[1] https://ubuntu.com/legal/contributors/agreement
[2] https://news.ycombinator.com/item?id=23365535