How are people getting most of their motifs, finding them, as rewards, how?

I have been searching crates, baskets, wardrobes, desks, pretty much anything I can open for the last 4 weeks and have not found one motif.

When the game was first released it was common to find the main “blue” race ones but I haven’t even come across these lately and I have never found a rare “purple” one. And like I said I have been going out of my way lately trying to find them but nothing!