How fast will proxies get banned w/ site: ?

Hey guys,
I have 10 private proxies which have been sufficient for some lightweight work in SB. But now I need to find the number of indexed pages for several hundred domains using SB Competition Finder so I will need to run this list full of site: queries.

How quickly do you think these 10 proxies will get banned? My guess is somewhere around the 300 mark since I was getting a captcha on page 3 of the serps when I pulled # of indexed pages with SEOQuake.

Any advice is highly appreciated!

don't use private /semi private proxies for scraping. Try finding public proxies for this ( start with proxy lists forum) or buy a subscription.

divok said:

don't use private /semi private proxies for scraping. Try finding public proxies for this ( start with proxy lists forum) or buy a subscription.

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Is that because the private ones will get banned quickly? I will look into public proxies! Thanks