Of course donations are a joint effort, but making a stance that you deserve to carry the benefit of now extinct players is perhaps not a very strong argument.
Yeah, right when the game was updated and more and more resource income is required, it is the BEST time to ditch the world development and get used with mines at even lower levels, just because some of the donors are no longer present.
I'd be trilled to play more with even less income, when the next buildings cost increases exponentially. This is exactly what we needed, right???