Every additional customer using their product currently causes them to lose money, hand over fist.

You should still boycott them anyway though, they care about user numbers and user activity.

How so? I can easily just delete the whole s3 bucket.

I use aws s3 deep archive storage class, $0.001 per GB per month. But your upload bandwidth really matters in this case, I only have a subset of the most important things backed up this way otherwise it would take months just to upload a single backup. Using rclone sync instead of just uploading the whole thing each time helps but you still have to get that first upload done somehow…

I have complicated system where:

• borgmatic backups happen daily, locally
• those backups are stored on a btrfs subvolume
• a python script will make a read-only snapshot of that volume once a week
• the snapshot is synced to s3 using rclone with --checksum --no-update-modtime
• once the upload is complete the btrfs snapshot is deleted

I’ve also set up encryption in rclone so that all the data is encrypted an unreadable by aws.

only windows (maybe mac)

I hope the QA is good. Training or no training, these aliexpress specials will probably just self immolate in your bag.