Apparently SF starts to use a download program for some downloads.
If this is the case for Gramps, I would not be ok with this. At the moment it seems for Gramps still the exe is downloaded, but the adds on the download page start to be hard to distinguish from normal content.
I think The GIMP team might have over-reacted a bit, and the author of the blog post  that they refer to in that announcement certainly overstated his case. A more reasoned discussion  by one of the admins from Portable sheds a bit more light, as does the original SF announcement .
The most important thing is that it's opt-in on the part of the project, so there's no risk at present of our installer being contaminated in this way unless we agree to it. I certainly hope that we wouldn't.