You can later sell presearch coins

Redemptions are scheduled to be activated at the end of June in 2018, pending the implementation of additional fraud prevention mechanisms and qualifications based on your usage.
We will notify all members via email when this is possible.
Please note that you’ve agreed to terms stating that you will not create multiple Presearch accounts, and will not use Presearch solely to earn tokens. You should use Presearch just like you would normally use Google.
Those who are found to be attempting to game the system may have their account terminated and tokens revoked.