(Summary: permission to use with fair attribution where convenient, and fair payment in cases of large increases in profits resulting from that use. Similar to Creative Commons Attribution-ShareAlike (CC BY-SA) but with fair compensation in cases of large resulting increases in profits.)
I am not a copyright troll (or a copyleft troll) and I will not sue unless you are clearly making a large profit from my work or undermining my own income and clearly not paying me a fair amount.
Find the full Alec Gargett Conditional Copyleft Creative License document here: https://github.com/alecgargett/ag-copyleft