According to the article, households "can expect to receive" (not that they will actually receive) 80% of the total C$2.81 Billion in carbon taxes that will be collected this year (that is $2.1 Billion in US dollars). That means the government's initial cut of the action is 20%, which of course will only increase over time. I calculate this year's government take at C$562 Million (US$420 Million).
$500 Million here, $500 Million there, eventually it starts to add up to real money, especially considering you are talking about a country with a total population of only 37 million.
The Harper government was providing child care money without an income test. I think they have rolled some of this carbon credit back into the child care money, but the Trudeau government decided to income test the child care payments. So the payment we were getting got reduced by 50% because we now make too much money, according to the government.