It is a matter of definition. Many parameters - including wagering requirements and bonus amount-affect. It is also to some extent a matter of taste. SeniorChef has anyway come to the conclusion that, for example, the casinos below have some extra favorable casino bonuses as the situation is now:
LeoVegas
- free spins with no wagering requirements
LuckyDays
- bold bonus amount and free spins in the same package
Expekt
- 100% up to 150 $ + free spins