Matching can be turned off due to 

1. Quality reasons - Follow the instructions we will provide via email
2. When you mark yourself as hired for a position.
3. You are not responding to companies on the Messenger or because you have been inactive for a few months. 

In any case you will be notified via email. If you want to continue receiving job matches please follow these steps:

Click onto your profile picture
Use the tab "Account"
Go to the third tab "Settings"
Scroll down to "Activate Matching"

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