This means that without a Prime Membership (~30 Euro a year), you can only import custom brushes (that use custom assets/shapes) five times.

Worse yet, if you accidentally delete a brush, you can't re-import it without using up one of your limited slots. The only way around this is to either lose another import slot or upgrade to Prime.

So please be aware of that, when downloading or purchasing a ibispaint brush set marked with a Gemstone Emoji 💎!