Estimates is quite detailed information, it will probably be announced later when the platform will be in its finishing stages.
You say that like changing the world and earning money are mutually exclusive things, you can do both at the same time.
I didn't meant to say that earning money excludes changing the world

But some figures always help to understand the relevancy of the project. If rewards are, say, 10 cents per day, it would be quite hard to persuade users to take part. And if they are $5 per day, that sounds more promising.