With deposit bonus, same as casinos, they will offer you good deposit bonus but the requirement is too much. I'll go realistic with fee discount especially if I'm already a regular trader to that exchange.
Just like there was a minimum deposit to get that bonus and that's too risky because there must be another requirement too. discount fees are more preferable.
Yes, that's what I'm concerned. You want a deposit bonus but it's likely that you have to deposit more than what you afford just for that bonus. For discounted fees, you're likely to take this for a long time and will benefit on it if you are a regular customer.