In a word, it is probably that Muncoin team have actually abandoned Muncoin project since April of 2018.
Of course, someone who invested money into Muncoin project can keep their hopelessly recovery of the coin.
Personally, I believe all gone away.
sadly to say, but you maybe right.
It seems that Muncoin investors, especially masternode inverstors, will lose all their money due to such a scam masternode project.
Hopefully it does not continue for another project so that other projects which remain in a State of safe.