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#X (#Twitter) will start charging new users in New Zealand and the Philippines $1 per year
(news.retiolus.net)
This is a most excellent place for technology news and articles.
They have dedicated blocks of IPs assigned to them, he would just have to block the blocks.
if vpns still run in china where the entire security establishment (including all the network infrastructre) are playing cat and mouse with trying to block them i think they can manage it for a tech company clinging on with 1/3 of the required workforce.
I'm not saying it's difficult to do, it's actually pretty simple. I'm just describing how it would be done.