Looking at the candid pics I just can't believe why she doesn't want to switch to HD clips. Her skin is looking better than many 20-30 year old models out there! She said that's because she wants all her members to be able to watch the clips without problem, even the ones with less powerful computers. With all due respects I don't think that's true because when you have a 1920x1080 clip, you can downsize it to whatever resolution you want and it will look much better than one initially recorded at lower resolutions, plus you have a FullHD or 720p version for your members with faster computers. Also I don't think she'd have any problem buying a fast computer and a HD cam.
IMHO, she may have been told many times about the dangers of HD for adult models, that is, "HD will only make you look older and uglier and will completely destroy the glamour look you've always wanted for your videos", which can be true for someone who DOES have visible imperfections, looks old or doesn't look so damn fine as Chloe does. She probably doesn't know that videos can go through airbrushing processes too, if you add that to a good lighting setup and a nice color correction process, you would end up having HD videos which look as good as those photoshopped pics you were talking about before.