Many factors can contribute to make an exchange platform, to be inactive. Factors like lack of support, mismanagement, lack of updates and so.
Also, there are things a trader should consider before investing on a platform. Trading fees, supported currencies, trading views and many more, are things to be considered before trading on a particular platform.
QB exchange is a trading platform, that supports trading in over hundred listed currencies. This exchange is known to have good trading features, and access to its main page is very easy and precise.
Alot of information about this exchange can be found in its website and other supported platform. Although, I couldn't make use of this exchange, because the exchange has been out of service, even before it was recommended to me.
According to my research and reviews from some experts, QB exchange has been inactive since 2019. As that was the last updates given on this platforms.
years ago, till now, no information or update regarding this exchange.