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What's I learn.
100%, but they using 10% increasement. IMO, these is the first time basically you got 80x waggering each 8x waggering you will receive 10% bonus balance credited to your account. I think these my first time seeing this.
Usually, they just credited instantly or making separated balance (deposit & bonus).
The bonus with specific percentage increasement like this is not a new thing but rarely used by casinos. If I remember it correctly, coinroyale used the same system in the past where the bonus is released after specific percentage of wagering. Perhaps because it is not really popular system and most gamblers are not really familiar with it because the most used system is as what you said in the last sentence, so some people think that it is a new bonus system.