I did notice that on the front page, when they are in the side column that is only text, there’s no real indication that they are supporter-only. In other locations they get the purple heart, or a ‘Supporter post:’ intro or something similar. I guess they lose that under the smaller text-only format for reasons of space.
I don’t find them super objectional either way, but it is more frustrating to click on an article only to find you can’t read it. If it’s clearly flagged then I can just skip over it.