I see there is an SEO friendly landing page for this here - https://elfsight.com/content-locker-widget/

Would love for this to be made as we are now using webflow for our website and have no way to make this happen without the help of elfsight.

Previously I used a wordpress plugins to acheieve this. Here is the info on that in case it helps you and your team with planning and programing, etc.

https://byonepress.com

They make two lockers - Social locker allows content to be unlocked by sharing about it, etc. The one we use on our site is their Opt-in Panda plugin that requires email sign up via manual entry, Facebook connection, linked in connection, gmail login or similar.

http://codecanyon.net/item/optin-panda-for-wordpress/10224279?ref=OnePress&utm_source=byonepress.com&utm_medium=banner&utm_campaign=banner

https://codecanyon.net/item/social-locker-for-wordpress/3667715?ref=OnePress&utm_source=byonepress.com&utm_medium=banner&utm_campaign=banner

There is even a non-wordpress version of the social locker available here - https://codecanyon.net/item/social-locker-for-jquery/3408941?s_rank=4

Hope that helps and all the best.