There are many online wallets like Xapo and Coinbase that do not charge any transaction fees or they pay that fees by themselves. I want to know that how would they profit from paying for their user's transaction fees ?
If no fees is charged then the transaction take a much long time or even might get cancelled !
They make a profit from buying and selling Bitcoin like coins.ph I think there is much bigger doing this instead of offering high fee and with so many people selling and buying bitcoin in their network imagine their huge profit..