According to my summary, there are basically several practical functions.
Pretend to show off: it's cool to have a distinguished title logo in front of your name and your own car when you enter and leave the entertainment channels such as the live broadcast room.
Privileged channel function: the function of shouting in the center of the stage, no queue or priority queue?
The role of renewing the red diamond coupon: most people not only show off their knighthood, but also take a fancy to it. When they renew their fees, they can get a red diamond coupon and brush more gifts.
Specific to the marquis and viscount, you ask.
1. Marquis: You need to pay 6000Y for the first opening, and immediately get/kloc-0,000,000 red diamond coupons and 6 renewal coupons, which can prevent LV2' s guardian skill coupons from renewing/kloc-0,500y and return red diamond coupons worth/kloc-0,750y.
2. Viscount: You need to pay 600Y for the first opening, and immediately give away 1.2 million red diamond coupons and 6 renewal coupons. With the coupon renewal fee of 1.20Y, the red diamond coupon with the value of 1.40Y will be returned.