1) No, who said that? (this doesn't go into user shops at all, just main shops and Igloo Garage Sale). You can go in the main shops, just it will choose the shops randomly until you have 500 posts or purchase the VIP rank ($3/month -- should be announced soon) if you don't feel like posting.
2) Lots of people run it on their main accounts, but you have to discipline yourself to not run it too long in a row or it seems a little unhuman to TNT, lol.
3) Some people have tried proxies but haven't reported any better success from using them. You can try so long as you make very sure that you've used that same IP address for everything on that account.
Hmm, it might have been a typo? I believe it was on this page or the guide, someone said something like that. I might have misread it, of course, too.
I can be very disciplined if it's on my main, and I don't think I'd use it all the time, because it's fun to do it yourself sometimes .
Okay, my computer has the same IP address every time I go onto the internet and I wasn't getting proxies at all, so that's a good thing. I have already downloaded it, but I was scared to try it, so I will now.
Thanks so much for your help and not yelling at me lol.