Well, according to Slack documentation, too many invitations apparently were not accepted, so they automatically enforced the rate limit.
I have manually re-sent all pending invitations, so let’s hope that will fix it.
As I already mentioned, you can PM me your email and I’ll gladly invite you.
The invitation rate limit has been lifted so we’re good to go 
Very glad too see, that blaze can go on. I really don’t like react and angular. I LOVE BLAZE. So hopefully it grows.
One of the reasons I loved Meteor was Blaze . I am not planning to switch to react , in other words, I am not planning to switch from simplicity to complexity.
I love blaze too, but take a look at react and it’s flexibility. Two different worlds with their strength and weakness. But just spending one week may help you choose better solution.
Blaze Fans here!! I am planning to stick with Blaze too. Cheers.