The thank-you email is a trust moment. A wall of S3 or Drive parameters feels like a phishing exercise; brand.link/seo-checklist feels like your product.
Same link across channels
Bio, ad, and email should resolve to one canonical path so analytics and support stay sane.
File host changes
When you move from Dropbox to Cloudflare R2, redirect /checklist once. Lifelong nurture sequences thank you.
Versioning
/guide-v2 or redirect in place? If existing subscribers expect updates, redirect in place with a version note on the PDF cover.
Mobile downloads
Test in-app browsers (Instagram, Facebook). Short links reduce copy-paste errors when the OS hands off to Safari.
Octilink supports rapid creation when you are iterating magnets weekly.