Backblaze is a very cost effective storage option and would like to see it supported in UD+. https://backblaze.com
Would be willing to pay a fee over and above the UD licensing charges to have a developer write the code for it.
This idea was posted in UpdraftPlus - backup/restore plugin and tagged offsitebackup on June 14, 2016 by 
Ewing Creative Admin.
I would also like to see support for Backblaze B2 added. They’re giving away 10Gb accounts and the storage is low-cost so would be an ideal candidate for offsite storage.
In the next release: https://updraftplus.com/backblaze-b2-support-next-release/