Could be some sort of bot run by the exchange or some entity related to the exchange to generate fake volume on site as well, though this particular exchange seems to have been around since late 2017 and that makes it a bit more reputable in my eyes, though there's almost no discussion on these forums or on many other popular areas of crypto-trading related discussion. Not saying it's not legit, but I would suggest against putting an excessive amount of money on the site.
A ton of larger and more reputable sites also allow for the trading of Tezos, like GDAX, OKEx and Kraken in addition to Binance. Plenty of better options out there.
It seems you're right it generates a fake volume because the exchange already has a bad reputation here on the forum and some reported it in the scam accusation.
Look at this below
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Exchange Big.One scam. False trading volumes. Fake tournaments. Theft of prizesI saw some airdrop and bounty for this exchange here and the bad thing is it's not well-known exchange but they are gaining rank on Coingecko and CMC.
Yep, seems like the exchange is rated at #24 on CoinGecko for their list of top volume exchanges and #30 for adjusted and #35 for reported volumes respectively on CMC, but I'm not too surprised considering I know CMC had BitMax as the top exchange on their site for a few weeks or even months a while back, though I believe the root cause of the high volumes on the site was partially related to transaction mining or something of the sort. Interestingly enough, CMC also reports BigONE as being pretty high up on their new list of exchanges by liquidity, though I suspect much of that's also faked.