Boa Exchange has launched officiant in 2018 and had just a year of global functioning. During this time it was enough to measure the availability of the resources of this company and its scope. It is not positively rated right now because it is not a fair company in terms of production and financial capital. Then, it failed also in the promotion of tokens' value.
Now, the project although remains active on the web is not being functional for users. None of the tokens supported there have received value or order of sales for more than a year. Anyways, none of those assets has global representation. They are just optional currencies to invest in, but their value is deeply low.
The best thing you can do is to remain as far as you can from the market of this exchange. Avoid using it while you don't confirm it's an appropriate source.