On April 2nd, coinciding with the shutdown of the Google+ social network, hundreds of thousands of photo album links are going to be rendered useless.
Google has a long history of this behavior, and you need not look further than Google's previous photo storage effort Picasa. When Google originally acquired Picasa in 2004, it began to offer the service as freeware. By the time Picasa was discontinued in March of 2016, album links from the service were being hosted via the Google Plus social network. History repeats itself.
Google+ - Month
Now that Google+ is set to discontinue next month...