Per this article today, be sure to say “Alexa, thank my driver” to your echo device and your driver will get a $5 tip.
The new thank you feature is part of a promotion that Amazon says it’s running to celebrate its impending milestone of 15 billion packages delivered. If a driver is one of the first one million to receive a thank you, they get $5. The five drivers who receive the most thank yous will get a $10,000 bonus, plus $10,000 donated to a charity of their choice. That means that Amazon will pay about $5.1 million to workers through this promotion.”