Also

* prediction market/betting site (with ability to bet on anything) with api and detailed historical data.

* Also, a stock exchange where I can invest in houses, small local businesses, commercial property. Should have api and historical data.

* A patent stock exchange (api+data)

Not $10 a month service, but something I'd pay for (maybe up to $10 per hour) Internet access to a factory robot.

$10 service - rentacoder like site except for factory automation services (bids/fulfillmnt on design of turn-key automation systems) along with api.