They could if they wanted, block all those VPN operators, though they clearly have chosen not to do that yet. In future years this could change as no one really needs to use one to access the system do they?
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As before, organised groups with multiple gateways to the web have the upper hand. As mentioned above, limiting from 6 to 4 might dissuade some of these though I'm sure many would just escalate their client numbers to compensate.
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Experience has improved as no more blank screen or unreachable errors. Better for customers - better for Public Relations. Bringing a huge global CDN in has made the operation less hit and miss but has officially reduced it to a simple ballot (albeit where those on big lists with more discreet IP's get to draw more straws).
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