The issue these days is that all of the EC2 IP ranges are well known, and are usually not very high-reputation IPs, so a lot of services will block them, or at

The issue these days is that all of the EC2 IP ranges are well known, and are usually not very high-reputation IPs, so a lot of services will block them, or at least aggressively require CAPTCHAs to prevent botting. Source: used to work for a shady SEO company that searched Google 6,000,000 times a day on a huge farm of IPs from every provider we could find