Crypto payments, and prepaid gift cards purchased with cash, make your transactions more anonymous. VPNs have long been used by journalists and political activists to circumvent censorship in countries with repressive internet policies. It's also open-source, and therefore has been picked over for potential vulnerabilities by anyone with the interest to do so.
With any security product, you want to be sure that the company behind it will be operating in your best interests. But overall, total size is a pretty good indicator for expected performance.