There are two ways a member can rejoin Introductions:
Introductions: By selecting "Turn on Introductions" from their Introductions page.
Profile: Re-enabling the option "Can be introduced to other members automatically" from the Hubs tab of their profile.
My Experiences: By selecting "Resume" from the My Experience" page.
Introductions Page
Click on Turn On Introductions as shown below
Profile Page
Click on Profile option (top-right) and then click on Hubs
Scroll down in the page and click on Edit in Interactions section
Scroll down in the pop-up and enable "Can be introduced to other members automatically" option
