The different ways to use a private proxy

Hi guys, I was thinking about making bots this summer when im done exams and was initially thinking about making youtube videos and bots that would get them views on sites like vagex and enchanceviews. I realized that one of the main investments for this would be private proxies. It would cost around 2$ per proxy for 3 videos, so about 67 cents per video (assuming 3 videos per account). One thing about buying these proxies though is that I would only ever need to use them once and it just seems like I wouldn't be getting a good bang for my buck. So I am just wondering what other sites(not bots like GSA or Scrapebox) do you guys use private proxies for? I know for facebook and twitter bots they would be useful as well, but what else comes to your mind?

you can use them for account registrations at google, craigslist, facebook, twitter and etc...

you can also do a JV with someone, so you guy share the cost..

OP, you can use a private proxy for just about any site and uses for them are only limited to your imagination.

innozemec, you didn't even read OP lol