Recently, I avail a special promotion sent to my email by a casino that I will not mention the name.
They offer me a 30% bonus on my deposit and the only requirements is just x10 wager so I become interested to deposit. As the game progress I notice that my wager doesn’t count towards my bonus so I ask for the support about the error. They point out to me that the bonus will just take effect if my main balance will lose first.
So this bonus categorized as cashback not a deposit bonus and worst it has wagering requirements. It’s my fault to not read the bonus ToS first but the email is clearly a deposit bonus.
Just be aware and always read the ToS, casino nowadays are using this method to encourage user to deposit thinking that it will be just a regular deposit bonus. Always read the fine print.
You are right, reading the TOS first would hurt, but also, even without reading the TOS, it's worth noting that casino, any casino, would rarely allow you to earn money through them. They can do that on rare occasions to attract more users to their platform, but normally all those promos won't make them lose money, they would go bankrupt otherwise.