That profile is empty, just few rep. and views + not so positive info in about section ;-)
I don't know exactly what it's all about, maybe it's just a person with problems and needs to direct it to people in general?
Everyone has his own style of communicating I suppose?
Evanto probably works well for the people up their because that place also has some stuff and members, personally find it a confusing place and the royalty system is weird.
There's also plenty of people up there that don't sell anything, so chances to join the same ranks also exist up there. People have also complained about the confusing payment system and generally getting less then 50%.
Average price of items is also very low so I suppose it also has its fare share of undercutting.
If you go and take a look at featured files (I suppose those are curated best picks)then you get a bit of a picture of general quality up there I suppose?
If you take a look at curated picks on pinterest account of CGt then difference is notable.
(https://nl.pinterest.com/cgtrader/3d-model-showcase/)
compared to (https://3docean.net/feature)
But if you really would like to get a picture of how well models perform up their you can just go and click 3D models and sort by best sellers, all info you need is presented.
To give some perspective, this model is up 3 years and sold 13 times.
(https://3docean.net/item/red-blood-cells-animated/4135419?s_rank=10)
Average of 1 sell every 3 months
This ridiculously cheap model is up for over a year
(https://3docean.net/item/industrial-robot-arm/12867944?s_rank=430)
not sold ones!
I think you cannot compare that place with CGt.