I work for Pusher and I have upgrade your account to a business plan for now.
We always love to help up and coming product, especially open source ones so drop me an email at sylvain@pusher.com to discuss this further. Happy to help.
This is very kind of you and Pusher, but I have to be honest, if I'm to ever consider hosting something like this I'd like the option to be entirely self hosted and not reliant on external services.
You can also get something up an running in Go very quickly that should scale pretty well and might make deploys easy since you can just compile to binaries.
1. Fixed.
2. https://github.com/flarum/tags/issues/10
4. Haha, I don't want to pay for Pusher right now. Will be working on a self-hosted push solution soon.
6. https://github.com/flarum/core/issues/115