Oh, apologies for the misunderstanding, I was refering to Google Maps being proprietary, not OSM :)
(A lot of Google's information has been added and maintained by volunteers, so I consider it unfair that our own shared information is considered their property)

As for the link, I see why it was not cought! Thank you for opening a Github issue!

(All this to say, thank you for informing me and for your work, I will keep it in mind for the future. I hope that my recommended change for the Changelist text box can potentially help prevent such future cases)

I will gladly specify.
This changelist was done based on my personal local knowledge and real-world experience.
Google Maps was pointed at to due to the information being officially updated by the local administration that is in charge of the establishment. If their information contradicted my statement, it would have had significance on weather my change to OSM was justified.

It baffles me that community and volunteer-led resources are considered proprietary... Especially when it comes to non-commercial projects such as OSM

Apologies for the trouble.
It would be nice if the Changelist recognized the google maps link and warned you of its use in the changelist