https://news.bitcoin.com/wp-content/uploads/2017/05/Xapo-Forwards-Miner-Fees-to-Users-After-a-Grueling-Two-Weeks-of-Backlog-640x320.jpg

> This week the bitcoin-based company Xapo has announced the firm will no longer pay mining fees for customer transactions and will forward the cost to users. The announcement comes after a hectic week where over 150,000 to 200,000 unconfirmed transactions filled the network transaction queue (mempool).

https://news.bitcoin.com/xapo-miner-fees-users-grueling-backlog/