Based on Coinmarketcap, the last data recorded of Bitboost trading in May, even though I had waited almost 6 months but this token still had a very low trading volume
What's wrong with this platform? Is it a scam, because I don't see the seriousness in developing this project

It was remove in coinmarketcap due to low trading volume, I cannot comment about scam because I have not seen any evidence that will prove.
One major problem I saw is that their lack of marketing and decent exchange, if people will see liquidity, we will still surely see this trading live until now.
Unfortunately even the Cryptopia listing didn't do much in raising the price back up, and volume still sucks although with Cryptopia exchange, it is much better but if platform is fully released maybe we would see more changes