[subway]

Trip requests only come in when the driver has marked themselves as available. Uber will often offer a guaranteed minimum for a given night if you mark yourself as available. The cut-off is to remove folks from the pool who sit at home declining rides while claiming to be available.

[greggyb]

This was my understanding (not to mention how the article reads). Thank you for clarifying.

Not to be pedantic, but do you have a source handy that indicates this? I would just like to have one for reference.

[subway]

Unfortunately I'm not able to find a public source to confirm that. My information comes purely from knowing and hanging out with drivers.