As always the person behind is the one who is responsible.
Sticky fingers, bad configured client, bad configured application or..
Somebody who was in a real hurry to move those coins.
It might even be a "hacked" wallet, there are thousands of possibilities and reasons for it.
It could be the wallet, like about a month ago, in the Mycellium mobile wallet, it was only allowed to choose fee from a drop down list, like low-prio, economy, high fee, etc. That time, users payed 10x higher fee compared to the market with the low-prio settings, because of the wallet's predefinied fee structure.
Now, Mycellium has developed their mobile wallet (at last...), and now, you can set your own fee.
Thanks to this, (and to the empty mempool, and to the weekend), now it's possible to have 2 confirmations in 20 minutes time with a fee of 20 sat/B.