Hi @jwink3101 @albertony, thanks for the feedback.
Jottacloud's listed speed reduction makes it practically unusable for the volume of data that I have, so I would need to use (and pay for) more than one account, and combine them (with a rclone's union remote) in order to get usable speed. In my present case, that would mean 3 accounts.
I have been experimenting with rclone's union remote for some time now and having all kinds of issues (I've just posted a specific topic in this regard) so I'm not sure whether it would work well or not with Jottacloud.
As it seems nobody else here has/is willing to contribute more info, I guess my next step is to try and create a few free (5GB-limited) accounts on Jottacloud and try to string them together with an union remote, and see how well they work.
Will keep this thread posted.
Cheers,
-- Durval.