I don't know why VamosTrade is out of business now, but I'm kind of lucky because I didn't invest in it. And, according to an announcement on their website, any remaining funds will be refunded to the client's trading account. It doesn't look like it's a scammer, which is really something good, at least for the traders.

VamosTrade is easily reachable and responsive to my issue. Flexible leverage from 1:100 to 1:1000 greatly increases my trading flexibility. I’ve traded with the standard account for one month, and I have to say that it is a truly decent broker.