I've been cross checking mangago with other manga site and yeah mmg is not updating most works for atleast three months now.
For example one manga have no updatefor atleat 3 months now in mmg but in other site they just got updated 6 days ago and have at least 5 chaps more than mmg. That's the common on all works that stopped updating. Some even longer then 3 months. And lacking in new manga too.
My theory is their scraping program is not working as it should anymore and Probably won't be fixing since is too expensive and the site is old.
So the site itself is not updating anymore but the only updates we been getting are from users and not the site scraping program anymore since it was degrading.

mangago your not dying right..? lately notifs seem to be having issues like there are times where I only receive 1-5 updates when I usually get 15-30… this the best site dont die on me