Best way to scrape millions of keywords per month from google

Hey,

I want to scrape round about 10-15 millions of keywords from google every month.
My problem is the IP-Ban that occurs every 100-200 Keywords.

I've tested some methods to avoid the IP-Ban and want to discuss with you, what is the best Method for scraping google.

Methods I've testes are:
– VPN-Crawler with HideMyAs, that reconnect on ervery ban.
– DSL – Crawling with a crawler that reconnects on every ban.

So what are your prefered methods to crawl tons of keywords?

I've heread about…

Best way to scrape millions of keywords per month from google