I suspect a lot of this is to do with supporter fatigue. It is pretty expensive being a supporter, at the cheapest you will be paying around £120 for the game, at the most expensive you will be paying £480 - that is a lot for a game that will sell for £10-£15 when it releases on Steam. That would be bad enough if you were supporting something new and exciting but to be honest, SotS is just more of the same but with a limited isometric view, Add to that the cost of living crisis and I'm not surprised that the number of supporters is falling.