You can substitute Google Photos for Amazon Photos. I have several Google accounts that have soccer photos, family photos, etc. I want to keep pictures of other people's kids from trying to be recognized as my own. And the family photos account can be be given to someone else to control without giving access to my email. You get 15G of storage with unaltered originals, unlimited if you let them compress.

If you set up a separate account, you probably don't have to worry about hitting the 15G limit unless you have many, many photos or are taking them at very, very high resolution.

We pay for family subscriptions to Google Play Music and Spotify. My wife and kids listen to music on our Google Home device and they do a lot of Youtube. I didn't want to do Spotify, too, but the older two asked for Spotify for Christmas because of the playlists only available there. $14.99/month x 2.

I was a devoted Google Reader user and I don't trust Google very much to keep things around. But it's easy to share the links with family and let them download the photos to their own storage.

I was also using Amazon storage to backup when they stopped doing the free backup storage, cutting it to 5GB (I think) for free. So I don't trust them, either.