To add specific users to a tier or membership, go to Members then Segments and click on the Segment you want to edit. From here you can add a new requirement to this Segment and copy and paste in the members you want to add.
To add specific users to a tier or membership, go to Members then Segments and click on the Segment you want to edit. From here you can add a new requirement to this Segment and copy and paste in the members you want to add.