Not even twice, all in all, Advent does about twice the usual Hololive vtuber by themselves. Shiori averages 200K in superchats montly, Bijou and Nerissa are around 180K. Most girls in holo do around 100K monthly, except for the heavy-hitters like Gura, Calli, Marine, Pekora, Noel, etc.
If you put it in perspective, FuwaMoco are doing around 4 times what their senpais are making monthly on average. It's NUTS. Holo really struck gold with them. If you compare with the rest of the industry, most successful indies do something between 5 to 15K on superchats monthly. Pomu, who was the heaviest hitter from Nijisanji EN did 50K average. Fom Niji JP, Rindou Mikoto averages 80K.
To say they must be hella happy with Avent is a major understatement.