I have reason to avoid this based on archives of their site. Try to check the snapshots for 2018 or older, they are running a different service than they currently are. I don't think they really started 11 years ago.
It's very possible they bought the aged domain, so now they have some history. it doesn't have to be a mandatory sign for anything, good or risky side of the business.
personally, I don't know anything about them, I may have seen their website somewhere, but not enough to have a clear opinion about them.
I wouldn't use them or recommend them, but as far as I can see, something is happening there. They are highly ranked on CoinGecko as "Derivative Exchanges Ranked by Open Interest & Trade Volume". https://www.coingecko.com/en/exchanges/derivatives
Also, the web stats of their website says quite solid traffic sounds based on Taiwan. also, most of the traffic comes from those countries Taiwan, Korea, China, and Japan...
Again, this is not my recommendation for using this exchange, just a short analysis of data from the internet.