eXch stated it was the subject of an international investigation involving signals intelligence (SIGINT), which created a hostile environment the team cited as their reason for ceasing operations

Quotes that support claims

We don't see any point in operating in a hostile environment where we are the target of SIGINT simply because some people misinterpret our goals," eXch wrote in the announcement

We don’t see any point in operating in a hostile environment where we are the target of SIGINT [Signals Intelligence] simply because some people misinterpret our goals," said eXch

We don't see any point in operating in a hostile environment where we are the target of SIGINT (Signals Intelligence) simply because some people misinterpret our goals," eXch wrote