I found two different prices for Google's Channel API.
https://developers.google.com/appengine/docs/billing says:
Channel opened $0.00001 ($0.001/100 channels)
https://cloud.google.com/pricing/ says:
$0.01 / 100 channels opened
Are those sites referring to different operations? Or is one source outdated? Assuming I want to use the Channel API in a server application used by 1M users (=1M channels) per day, will it cost
$0.01 / 100 * 1,000,000 = $100
or
$0.001 / 100 * 1,000,000 = $10
per day? Thanks for clarifying this!