I mined block 1493420 on 17/9/2018 using the M address before I discovered this forum, I posted numerous times and also PM to loshia1974. I never had a single response, yet it's still operating to now 10 months on. It's very strange, if the electricity/hosting bills aren't being paid for, it can't continue to operate untouched. On the other hand LTC block explorer indicates the pool wallet has balance of 1,278 LTC as of this post. It doesn't look like the coins generated that went to the pool's wallet have been spent.
Maybe we just have to watch the pool's wallet balance see if it's reducing, it means someone having access to the pool's wallet is still around.
I'm checking the pool's wallet balance via an ltc explorer.
https://chain.so/address/LTC/LUNyycVonDH9aQMZn1fxyUeu8N3yS8w7udRitchie