I too switched from Crashplan because of their closure for home users. I started a backup last Friday and noticed I was only uploading 60 GB per day, which is crazy low since I have 50 Mbps upload. Granted I have a QoS rule for limiting to 20 Mbps but still 60 is not the 200 GB it should have been.
I opened a ticket on this too but I figured out last night that their servers are limiting connections to about 4-4.8 Mbps for each backup job. This morning I scheduled 4 separate backup jobs from my QNAP and magically I'm getting 4-4.8 Mbps PER JOB. That's right I got the boiler plate we don't restrict bandwidth response and I just sent them back proof that their servers do limit it per job. With 4 jobs I'm getting about 20 Mbps right now so I just effectively cut my backup time from 30 days to about a week.
I'm sure this will make them happy but if you want more bandwidth just create multiple jobs for different folders and schedule them to start at the same time.
https://i.imgur.com/Yohfg8C.png
You can see the 4 connections highlighted in Yellow and their total upload all to the same IP address.
I'll provide an update but it looks like each job spawns a new PHP process that will use as much CPU as it can so 4 jobs literally take my QNAP to 100% CPU but at least it's faster...
