Happened with both his COINO & MINT pools.
Lots of blocks mined but owner kept the payouts for himself & hid it under a "server upgrade".
Don't know why people still go back & mine at his pool

You will notice a vast majority of pools have issues. And the reason this is that while the pool software is open source, is excellent, and it is an amazing contribution it is not perfect. Much like many open source projects. In fact, there is many commits everyday to the system, on github, to fix issues and problems in the software.
The point of this is that pool owners are dealing with a complicated system to setup, and maintain. If it was easy to do then more would do it. But it's not, and things break.
That's BS. It's only Hashrapids pool having this "problem". I was mining at your MINT pool the first week up to the point it went down for an upgrade.
Once you have the new pool up, you did give us a link to withdraw our coins from the old server, but it was less than before the server went down. I was able to withdraw my coins, but there were a ton of confirmed blocks, with no payout to miners. We asked you about it on the MINT forums but you never answered them & just disappeared.
Oh & my COINO coins where I sent you my wallet address 3 times, I still have not received them yet.