M4rt1n sums it up well, I block Linode on all my sites; many others also do. If the sites have re-captcha on, you could use the privacy plugin browser available on the browser store such as chrome store, but if you are getting access denied (403) then that is useless.
There are a few like Linode that are extremely toxic, so many content scrapers theifs, web attacks, web probe scans, and invalid traffic doing click farm bombs on ads I could go on. less than a few % would be legit users if that, so most just block it.
Sounds rough for you, but it will probably get worse given the global state of the world economy, most website owners need to ensure traffic sources are legit now more than ever before for ad revenue, or people running stores and avoiding high traffic costs on bad datacenter traffic, or other things that cost $$$.