Unity + MailChimp
Email is still a great way to keep in touch with your audience. Social networks ranking algos are not transparent.
Here’s my tiny GitHub project to subscribe users to your MailChimp list right from your Unity game.
MailChimpSubscriber - Subscribe users to your MailChimp list right from your Unity game.github.com
It works through the latest 3.0 MailChimp API and must be working on any platform supported by Unity.
Just set your API Key, ListId, and call Subscribe.
Redirecting users to a website is not a good option. It’s an extra step, which is slow, complicated, and would suspend a game session.