I agree, Eddy, that Avast wouldn't knowingly bundle what ComputerActive magazine calls a PUP with their download. Seems PUPs attach their 'crap' program to normal good ones in order to do their work. I became alarmed when every time I clicked on 'Decline' it just moved me forward to the Install button! Even at that point there was no way to get out of the process except by shutting down via Task Manager.
If Avast allow CNet to be used as a download site, they ARE knowingly allowing other software to be bundled with it, because that's what CNet does, and a substantial proportion of the computer community are aware of that.
Re PUPs in general. The keyword there is the first "P", which stands for "Potentially". Many PUPs are not inherently bad, it's the underhanded delivery methods that are. I have several PUPs specifically excluded from reporting in MalwareBytes because they are programs I wanted and installed deliberately myself.
When I look for a program or update my preferences are:-
1. The author's site, if it offers direct download.
2. MajorGeeks.
3. FileHippo.
Some sites that definitely bundle:- CNET., Download.com, Softonic, Soft32, Tucows, SourceForge, Softomate, Brothersoft, Filewon.com. That is NOT an exhaustive list.