[OSGeo-Conf] Open open source, reduce registration fees.

[Darrell Fuhriman]

> Personally I doubt that we will get bids for anything that we would recognise as a FOSS4G Global at $500 registration unless the organisers can get a massive boost in sponsorship in advance of submitting a bid (as Dar es Salaam did with the World Bank sponsorship). 
> 

Agreed. To touch on this and David’s point, at the rate we charged in 2014, the conference basically broke even. The money we were able to return to OSGeo was almost exactly the sponsorship amount.

Darrell