No reason to leak anything from Russia. It's not a secret but a law here that SORM-2 devices are mandatory to install by each ISP (very small ISPs may wait for up to two years, though). It must have full access to mirrored traffic crossing the AS border and RADIUS traffic (in case of TACACS+ ISPs are also asked to reveal encryption keys).

While I suspect they're mostly laying dormant and don't think they're secretly massively abused in mass-surveillance, no idea what those black boxes are doing, though. The point is, they're here, they have full access, and they technically could be abused anytime, so don't transfer any sensitive data to or through Russia unencrypted. Like with any other country, possibly except for Equestria.

Disclaimer: I work for an ISP.