I suggest you also search the forum for "OneDrive throttling":
https://forum.rclone.org/search?q=onedrive%20throttling%20order%3Alatest
I typically see OneDrive upload/download speeds between 10 and 50 MB/s - and even less if transferring many small files.
More info on OneDrive speeds and throttling in the posts linked from this post.
Note: Similar limitations apply for other pay per GB services like Google Drive and Dropbox.