They're running it on Value DeFi, which has other great pools as well that you can check out. Here's the home page that has a list of all the pools they offer with the APYs: https://valuedefi.io Here's the direct link to the Sentivate pools: https://valueliquid.io/#/faas The returns are so high that you can double your money in a month if they hold. They will probably decrease as more people join the pools, but they are still extremely profitable/worth it.
Definitely a ponzi. No way a deposit product can make 30% APR. I did some usurious bitcoin P2P lending back in the day. Real crazy credit risks. That is the only way you they can get those yields.