Is there any reason Snowden would be in a position to know this? The article doesn't give any evidence, but merely an accusation. Snowden was privy to intelligence info in 2013, but it's been 5 years since then and I imagine that his knowledge would be too dated to know what's going on here.
I think Edward Snowden now is a lot more like John McAfee than Edward R. Murrow. Snowden is trading on his personality and celebrity moreso than journalistic integrity or technical credentials. Snowden might have sources leaking to him, or he might be acting as a front for someone else, but it doesn't matter either way. People will believe him because he says it and it sounds plausible. In a few years he'll probably…
That's an interesting prediction to make of a guy who became famous because his personal sense of ethics overpowered every other concern in his life. It's hard to imagine him trying to cash in on that fame.