Just be wise in choosing, and you know the legit and recognized exchange trading platforms, Binance, Bybit, Okx, and others that are top players in the market are leading there.
Still do your own research.
Same here but maybe you mean to say that our IP is block on that website (not his) because he can access it and he is here to ask our opinion about it. According on the link that he shared, I think it was a video game trading platform, so your site recommendation there may not fit for him.
Well, I'd say it's nice of you inquiring and researching otherwise some investors dives into any vacant opportunities because there're seemed to be attractive features out of it and out of greed they don't hesitate to have their funds invested there and potentially it could be a scamming scheme.
After going through the site it seems a total strange so to keep safe, it's always advisable to deal on recommendable and reputable sites such as ones @hugeblack has listed for you.
We have a saying that when someone is attractive, especially too much of it, there may be catch with it. This is a reason for us to do an investigation first but maybe those who didn't doesn't value their money too much or maybe they are earning more? So, it's okay for them to lose some of it. BTW, the ones @hugeblack posted are mostly payment methods only and not a site or an alternative to what the OP is looking for.