We actually had to stop using Intercom because of their pricing. We had a custom plan for years that accommodated our needs greatly. We were very happy and sang their praises all the time. A couple of months back they announced that they would be changing their pricing, so our $300/month price would become $2000/month. We started a long discussion with a sales person back and forth and they just wouldn't help us. We got copy and pasted responses that were not at all answers to our concerns.
It ended with them charging us $1800 even though we explicitly said we just wanted the "Chat" option for $100 per month a couple of times. After a stressful evening they refunded us. It really did leave a bitter taste in our mouth.
I agree completely with the article. Intercom was a crutch for us to deal with the failings of our own product.