Good thing that I came here to browse for a new hosting site for my older machines.
I didn't get the original email either. I only noticed when my pool hashrate dropped, then found out all my s15/t15 machines went offline. Though all my s17's are still hashing away with them. I emailed them and got that message.
I decomissioned all my s9's last year. I'm fortunate that I only live about a 3.5 hour drive from them. I had about 40 machines, so it was way cheaper to pick them up.
Guess I'll have to make another drive soon.
If anyone knows of hosting with similar rates, I would love to hear about it.