Hi,
In PureOS we are currently discussing how to most sensibly handle
Uploaders field when forking packages.
We already follow the [guideline] for Maintainer field:
When modifying source packages, rename the Maintainer field to
XSBC-Original-Maintainer and add a new Maintainer field.
Another practice - which I personally find more reasonable - is to
remove the Uploaders field. My reasoning is that it has no relevancy
for a forked package who was responsible for uploading within the
upstream release process).