Had to eliminate the option of purchasing hi-res PDF downloads of THE SOLAR GRID, because the cost of storage/bandwidth was far surpassing the revenue made from downloads. Not too happy about this, because I've always felt that the option to acquire hi-res files had to be there. But, this is a necessary consequence of basic economics.
Especially with various income streams disappearing for the foreseeable future, will have to look at ways to cut as many costs as possible (which I s'pose is what one shouldda been doing anyyywaaay.).