Whats the license on these?
Things you can do -
This license grants you, the purchases, an ongoing, non-exclusive commercial, worldwide grants you, the purchaser, an ongoing, non- exclusive, commercial, worldwide license to make use of the item (game asset) you have selected to make games, or interactive content.
Things you can't do -
You can’t re-distribute the Item as a game asset, as stock, in a tool or template, or with source files. You can’t do this with an Item either on its own or bundled with other items (such as an asset pack , or collection of item), and even if you modify the Item. You can’t re-distribute the Item as-is or with superficial modifications. These things are not allowed even if the re-distribution is for free.