To me this looks more like a competitor to CodaLab than Kaggle, and seems to target the ML research competition market. It seems unlike Kaggle, it doesn't seem to support things like notebooks, discussions, etc.
I might add that the comparison to Kaggle is added by the OP, I don't see it mentioned on the website anywhere.
That said, my point still stands. Additionally, the comparison they did is massively unfair. I'm pretty sure Kaggle competitions have most of the feature they claim it doesn't have (ex: multiple phases, custom metrics, evaluation in environments).
Kaggle has two parts - more popular "featured" competitions which have most of those features, but cost money to host. And then also self-hosted competitions which indeed lack all those features and are more relevant for this comparison IMO.
The comparison is indeed quite old and hasn't been updated. I work with AIcrowd and would love to know why you think it is poorly managed. I know we have a long way to go!
I might add that the comparison to Kaggle is added by the OP, I don't see it mentioned on the website anywhere.