Stacks allow Delicious users to curate a folder of links round a topic. Under the new "consolidation", stack names will be converted into "tags" and applied to linked content within stacks.
From early next month "users will no longer be able to create stacks on Delicious", the platform states in a blog post, but stresses that links will not be lost.
However features such as stack descriptions, stack categories or stack followers "will not be included as part of the migration", a blog post adds.
In an email Delicious says those behind the platform have been "blown away by the amazing content" created using stacks.
Journalism.co.uk has itself found stacks a useful feature and has created stacks containing links to potential tips for journalists, apps for journalists, tools for journalists and posts reporting on digital journalism conference news:rewired.
But the email adds that Delicious has decided "to simplify how users organize links on Delicious by consolidating stacks into tags".
The announcement sent to Delicious users this weekend states that the move from stacks to tags is in preparation for the "upcoming launch of new products from Delicious's parent company, AVOS, and our focus on simplifying the Delicious site".
It is not clear what the products include but The Next Web wonders if this relates to a new service called Zeen, which is to allow users to "discover and create beautiful magazines".
Delicious has also released a new feature called "Facebook connector for Delicious". The addition is similar to the "Twitter connector" rolled out in March.
The Facebook connector "imports every link you've ever shared on your wall, and can even maintain the original privacy settings given to your links on Facebook". The Twitter connector imports "every link you’ve shared via Twitter in the past (up to the last 3,200)" and ignores any duplicates.