Well the site/network/service that you're trying to create on is the ultimate judge. I've seen some sites where you can sign up 2-3 accts per 24hrs from the same proxy, and I've seen some that you can only make 1 account period, and that IP is done. That's rare, and what's more likely, assuming the proxy hasn't been totally destroyed before you, is that you'll get a temp/soft block if you create too many. That's usually the first step, however, if you keep triggering their security more than likely you'll then get banned, and depending on the site they may "reverse-ban" all of the accounts that were tied to that IP as well. That is much more rare than people think, and in all honesty there's only a few places that will kill in batches like that. The best thing to do for a general rule is to take 5 proxies and try and create 5-7 accts, and then do it the next day as well. If you can fire off more than 5 accts per IP without running into any problems, then it's probably unrated. If not, you'll know when you hit the limit, and if you do, try and create again in about 24 hours to see how long the rating lasts. In a perfect world you'll want to do as Christian said above and go 1 for 1 with the account always tied to the proxy it was created on. Your best bet is to play around with it yourself, because your IPs and their reputation if they have any could also factor in. Thats one of the reasons there's so many different opinions out there, because there are a lot of variables that go into it.
