I don't think I've gotten any wholly unsolicited emails via Mailchimp or similar services. I still usually file them as spam because I hate that links they contain are obfuscated redirects -- for tracking purposes, but I'm much less agitated about that than the removal of link functionality -- I like seeing where I might click is likely to land me before clicking. If I happen to forget/not notice and mindlessly click on a link in an email, uBlock Origin helpfully blocks most such tracking links.