In 2018 the WordPress dot Com community stopped hosting any community blogging challenges. Many people who participated in these challenges appreciated the community atmosphere that they encouraged and were sad to see them end.
However, a somewhat concerning development from the related change has come to my attention.
This development affects everyone who either blogs on WordPress dot Com or uses Jetpack and participated in community challenges at any time.
All links to the community challenges have been broken. This situation means that all posts that you linked to any challenge have now broken links.
Of course, Google and all major search engines frown upon broken links because it suggests low website maintenance. Which is why it’s always a great idea to be careful about who you link to.
In regards to any broken links, my suggestion is to go through your posts manually or install the Redirection Plugin to deactivate these links. I personally use this plugin on all of my sites.
I hope this update and alert help.