I suggest we make a new tag free and then make it a synonym of gratis.
This will mean when new users type 'free', they are suggested with 'gratis'.
What do you think?
We got rid of the tag free
because it is ambiguous: it could mean free (libre) software (i.e. open source, software that you can adopt and modify), or freeware (gratis software, i.e. software that the vendor doesn't charge for).
It has recently become possible to show a short guidance text when a poster tries to use a blacklisted tag. I propose:
The tag 'free' is ambiguous. Please use gratis for software that doesn't require paying money, or open-source for libre/open-source software.