Shameless plug, we have a good set of illustrations on https://www.storyset.com/. The big difference is StorySet illustrations can be animated and the styles are different. Both products are quite complementary.
Excellent question… we don’t have a separate subscription for StorySet, but you can download all these illustrations in Freepik.com without attributing if you subscribe to Freepik.
It’s an oversight that we don’t allow explicitly in the terms of use of the Freepik subscription to use content downloaded from StorySet without attribution. Let me try to fix that tomorrow.
Sorry the system is not straightforward, StorySet is a side project and we didn’t think of monetizing it.