not worth more than 0.01 imho, if i add even a single rig i would kill the profit, or i need to wait for someone else to leave
to buy back 0.05 with a single rig you need more than one month, you need to factor the difference with other algo, which is something like 0.0015 per rig, a joke...
People who donated for the spreadminer back in 2015 still get free updates.. Some have mined spreadcoin since the beginning, and making huge profits...
A private kernel without a fee can be used when there is nothing else to mine. If you have a few rigs, you should support my work on the NVIDIA gpu's. I gave you pascal +20% and skein sp-mod opensource for free. Please donate and recieve private kernels..