Also, «Маша» (Masha) and «Мойша» (Moishe/Moshe) are completely different names, and I've never ever seen anyone using the former for the latter. Either the author stretches it a bit too much, or the author knows something that should not be publicly revealed in the manner they chose (and the whole post is just an intimidating leak).
Anyway, if the author(s) have successful illegal business, as implied, they shouldn't have any difficulties in acquiring enough spare identities to burn. As a side note, it's quite ironic that “security” is such an idol today that common people need to go out of their way to evade tracking, while even petty internet criminals buy virtual identities in bulk, and have special instrumented browsers to load fake system data with one click.