proxies for social media and google

Hi, I would like to create and manage this with one proxy: 2-3 Instagram accounts. 2-3 Twitter accounts. 2-3 Facebook accounts. 2-3 Google accounts. 2-3 YouTube accounts. 2-3 Pinterest accounts. 2-3 Paypal accounts. 2-3 Bank accounts. The PayPal and bank accounts are only for 3 IPs the rest of...

Hi everyone, I want to pay private/dedicated proxies that work for any fuc**** thing I want. But I see proxies for google, for linkedin, for instagram, etc. Can someone explain me why, if a private/dedicated proxy is, just that, private/dedicated, it would work well for Google but not for...