Means that trustdice has standard wagering requirement for deposit bonus but trustdice has slightly higher wagering requirement (x5) for deposit (without bonus) compared to other casinos where the standard wager requirement to withdraw our money without bonus is between x1-x2 only.
You're correct.
Wager requirements on real money and bonus money are different, we should read more carefully about the games and odds to fulfill the wagering requirements. Some casino usually ask for minimum odds and different games will give different calculation, it's like if we gamble on pragmatic play games for $100, it will count for $100. But if we gamble on Play'n GO for $100, it will count for 0.5 or $50.