“Snap to road” is a real problem, the resulting GPX will be completly destroyed and it not raw data anymore. Very sad, because it can be really troublesome for many uses, that need raw data, other than Openstreetmap. You could always upload the tracks with the tag “maybesnaptoroad” :-).

PS. I’m not 100% sure what you ment by “are those tracks tagged” so I hope I got geist of it.