This article quotes a freelancer who says it will make no difference to his business. For those who think otherwise:

https://community.upwork.com/t5/Announcements/How-new-pricin...

In addition I think it's weird for a company who should be all about scaling and automation, to say that smaller jobs are costing them significantly more to service than bigger ones. The differential should be negligible. I'd be interested to see the detail on that.