I usually deposit to trigger the bonusand then play through at lowest stakes to meet wagering then more often than not im up by the first opportunity to withdraw. Its definitely easier to make mony from bonus hunting at casinos that accept bitcoin while theyre in the current mood. Let me know your thoughts gamers! 
No, it is not easier to make money from a bonus because if you don't deposit some money, you will not be able to withdraw the bonus. Sometimes, you need to deposit some amount and play for some round too, and if you win, you are lucky to withdraw that money. I prefer to deposit some money and not hunt the bonus because that will not easy for me.