I haven't heard anything from e.g. Google or Facebook's open source funding endeavours. IMO every successful company should do their part and set aside a sizeable percentage of their revenue to paying and supporting open source projects and developers. It's wrong that e.g. the developer of cURL is (was?) struggling to make ends meet, when he (and the people behind gimp, etc) develops software used billions of times a day. That should make him hundreds of thousands a year.