Earlier quoted context omitted.
> Creation of invitations requires an iCloud+ subscription. I really wonder what the uptake is on iCloud+ subscriptions.
Pretty high I suspect, since you need it if you want to back up more that 5 GB. If you keep photos and videos without dealing with a separate service, it's pretty much a no-brainer. And the cheapest tier is $0.99/mo. for 50 GB so it's not exactly breaking the bank.
This is a huge trick. Like any other service where the most friction is setting up billing... then they can increase the price easily. Do upgrades to other tiers require confirmation?