Thanks for the feedback. The illustrio license applies to all graphics. What differences have you noticed between the pop up and the detailed text? We might need to clarify if anything is unclear right now.
Also, you may customize other things than colors by playing with the inputs in the left side-bar under each "product". Try to play with the slider under Percentages for example. You need to click on Percentages first.
Ah, it's only in some categories. That is definitely a neat feature now that I see it. Unfortunate that the licensing makes this something I can't use. I'd never get your license text past the legal team at my day job, and almost all of my side projects are FLOSS. Plus, having a policy of never using anything that I can't either own the rights to or use and modify under a permissive license makes my IP management so much simpler.
The summary license says that you can't redistribute the graphics. Admittedly, I'm used to licenses such as GPL where including the file in an app's package file would be "redistribution" - it looks like you mean "no redistribution of JUST the graphics file" which could perhaps be clearer.
Also, the license seems really concerned with not putting any of your graphics in a theme or template. Why is this? I'd consider offering a licensing option which permits this, perhaps on a different pricing structure.
You say can't use in/on a paid product, but can use in a paid service. That's confusing because I'd think of my paid website service AS my product - I think you might mean "no use on physical goods for sale" which is another restriction I don't particularly understand but okay. Again that might be something to offer an option for.
All good points and we certainly need to clarify a couple things. The reason why our license is restrictive is because we target non-designers who are generally not making a living out of design. This way we can offer our own pricing and not compete with all the already good icon and graphic providers out there targeting designers. It happens non-designers are also happier with our limited editing features than Adobe illustrator's for instance. Hope it makes sense.