Yes. For imagery that shows an entire road, these seem reasonable. However, sometimes I take detailed imagery for additional information, e.g. here's a fixed point. It can definitely be mapped but the only info this image delivers is "it's a fix point" and the coordinates in EXIF:

Or, here's a sign I found on a barn that informs us about the build date of the barn:

Should I just put these on Panoramax as well?

gpx (OSM)

Yep, that's the right place for the tracks. Not even necessary around here, because we can use excellent public open data for mapping, 20cm/px aerial imagery, digital surface model, stuff like that.

The important part are the images, but I can't really upload them to any existing image service out there because they are only useful for osm. Some samples. You can see that these would be wrong on any panorama image service, they are really mostly road, a barn, a sign, you name it.