if we are talking about their activity, they are active in all of their social media. their platform looks good too(not that bad), but it does not mean they will not scam you. I suggest you do the stake on your own if you are intending to use their service to stake your coin, but if you want to use their exchange. you can use it for now(I do not see any complaint from the users about their exchange until today) and withdraw it as soon as possible.
you will never know what will happen to them, remember if you do not have the keys that mean you do not have the coin.
