recently I tried to implement a resumable multipart uploader, which I´m currently using for my AWS S3 Buckets. It is working fine on DO Spaces, but it is not possible to continue aborted uploads.
I found out, that it is not possible to change the policies on DO Spaces. But it is necessary to have an allowed Policiy with:
to work with uncompleted mutlipart Uploads, either to continue uploads or to remove uncompleted.
Therefore i recommend to make these settings as default for spaces, as it is on AWS S3.
I think DO and his customer will have just advantges, for DO they will have less incoming Data and customers are able to offer resumable uploads to theire clients.