Can I share demo or sample albums publicly to show off how it works?

Absolutely — Snaptide itself does exactly this. The homepage links to full-access example galleries (built on royalty-free stock photos) so anyone can click through and experience a real album before signing up. As a photographer you can do the same: create a showcase album with sample work and share its full-access link publicly, in your portfolio, or on social media. Just be certain every photo in it is one you're happy to have public — because that link genuinely is public.