Upload & Sell: On
Have you ever heard the expression "same same -- but different"? :-)
For your first question, in LR, you might have a collection of favorite shots. Rather than saving the raw file to a folder, you'd add it to a collection. That way, all you favorites would be available any time. Some people rank their favorites with stars. Others use color labels. There's a lot of flexibility.
To resize for the web, you'd Export the raw file. You can have presets that include the size, the amount of sharpening, a watermark, location, etc. You can also have "Publish Services" that send shots to Flickr and other sharing sites. Again, a lot of flexibility.
Same same -- but different.