Yeah, I did the External button thing, and then added the Mega link.
I tried it in an incognito window and it led me directly to the Mega window no problem.
You can always visit the Patreon link and it will direct you to the site that has the Mega link (I want people to go through my Patreon so I can convince them to help me fund more games, otherwise I would just post the Mega link right here).