Discord originally hosted on Linode in 2015. Unfortunately we had to move off, as we knew Linode would be the limiting factor in being able to continue to grow. So we chose to go with GCP.
Unfortunately, I suspect this is something that happens quite often for Linode, which is that, their most successful clients will eventually graduate off of them.
This may reposition their business in such a way that their most successful clients stay with them.