The brain has reward centres which are activated by dopamine and these regions increase our motivation; the more motivated we are, the more dopamine is released. (blog.politics.ox.ac.uk)
Some of these techniques are based on science that shows that the same pleasure / reward centres in the brain that light up for slot machine wins react in a similar way to «likes,» friend requests, message notifications and @ mentions. (slaw.ca)
8 Bonus (double) Aventura Points are earned on each dollar charged to the card on CIBC Rewards Centre travel purchases charged to the card other than taxes, insurance, service charges or similar items. (cibc.com)