look at the text version of the email, it contains the actual URL.
based on your post i checked if i got the bundle that included world of goo, and it turns out i did. it contained the key url as http://www.humblebundle.com/?key=... and that url is still working. as someone stated elsewhere in this discussion, the humble bundle version is not updated. it's downloading version 1.30 right now...
in the meantime i am playing osmos in the browser which the humble download page helpfully includes. i am pretty sure that can't have been there when the bundle was released initially
Re:World of Goo Update, 10 Years Later
by dorian-graph on Thursday May 02, 2019 @07:55AM
(#19806869)
This is hilarious, and sad.
Re:World of Goo Update, 10 Years Later
by theandrewbailey on Thursday May 02, 2019 @08:22AM
(#19807066)
Have you tried making an account on Humble Bundle? It might be worth a try to see if it recognizes your old purchases.
Some of them encode the target URL in the tracking URL itself so it might be worth checking that. I think MailChimp uses a Base64-encoded JSON object in the tracking URL which you can decode and get the real URL even if the tracking link is no longer working.
Interestingly, the part of the chain that failed was their then email marketing provider, that hijacked all the links in the email to provide click tracking, doesn't exists anymore. So all the links are dead even though they would have redirected to pages that are still functioning.