for using paid item you have to purchase extended license also you have to get their permision to use it in your item. Free you can use if they have full 100% permission (as like MIT license) to use in commercial purpose.
for using paid item you have to purchase extended license also you have to get their permision to use it in your item. Free you can use if they have full 100% permission (as like MIT license) to use in commercial purpose.