What is the reason for saving the end-to-end encrypted backup files on Signal backup servers instead of iCloud or Google backup service, as most of us are already paying for this storage?
Besides the obvious (they want/need the revenue from selling their own solution), many people using Signal do so in an effort to move away from Big Tech and/or on devices with custom ROMs.
The "Signal should exist" part of me is happy to donate $2/mo to help them keep the lights on, but I really did expect that to be an option alongside Drive/Dropbox/et al, not the only option.