how about somebody started an MIT licensed alternative to it?

there is n8n.io have you checked it?

Flogo - https://github.com/tibcosoftware/flogo

Huginn - https://github.com/huginn/huginn

DataFire - https://github.com/DataFire/DataFire

And yes, none of them as complicated as Zapier, which is kind of running a monopoly iPass, exploiting each integration provider.