Yes I have been using ActionCable and everything works just fine on my local machine. It's just when I deployed it to production server that I got those errors
Not necessarily. I always do that myself.
Ah that's a good idea. I am using Stripe. Is that possible to configure Stripe to do this? WIill check out the that link
Free then upsell later is the way to go. You can try to copy Gorails.com model