As discussed in the chat, the easiest way seems to use a hosted newsletter service such as MailChimp and just embed their signup form. No need to custom build something for Rails, unless you need deeper integration.
Also, WIP now has a prototype available for signup forms for your products. For example:
wip.chat/products/1725/subscr…
It's not possible to embed it on your own site, or host it on your own domain. But let me know what you'd like and I might add it.
As discussed in the chat, the easiest way seems to use a hosted newsletter service such as MailChimp and just embed their signup form. No need to custom build something for Rails, unless you need deeper integration.
Also, WIP now has a prototype available for signup forms for your products. For example:
wip.chat/products/1725/subscr…
It's not possible to embed it on your own site, or host it on your own domain. But let me know what you'd like and I might add it.