https://www.presearch.org/signup?rid=513056
Everytime you search through presearch, you get rewarded 25 PRE.
It's working on google chrome and the search engine varies from google to amazon.
You can choose whatever search engine you use.
Moreover, if you install google chrome extension, automatically default browser will be converted to presearch...
Enjoy and get rewarded for your search.
Have a nice day...