You would need to get in touch with brilliant about that, but I’m not surprised if they got flooded with way more users than they can handle.
Apilio may be another alternative, they have some staff members who post in this forum. But they have a different business model: instead of using Ifttt to make physical devices more salable, they charge a subscription for using their service. There is a free tier, but I don’t know how much you can do with it.