Actually we adopted pretty much the Andy model where you're buying access to all addons except premium ones before we turned most Snogs/Ozzmodz products over to painbaker. To my knowledge he's merely keeping that model.
I've seen call outs of bad devs here on xenforo. If he's using the site here to then do fraudulent or black hat work, we need to know who it is and you would be doing the community a great service. At the very least you should consider reporting this nabob to the admin here.
Nothing was moved. We had ALL of our products available on our site since Day One. We just no longer choose to have them in this storefront. Like some others do.
Nothing is blocked by robots.txt.
Noble crawlers will honor it. The attachments folder will have all images, video and media that is uploaded as attachments in posts by users. It's going to be a huge file potentially. If you want noble crawlers to index it that's fine.