It's 6% for the first 500 ether
what is that service you are talking about? I suppose there is still counter party risk? If not even more?
That's pretty much trusting around $70,000 on today's prices on a company. While 6% annual interest for that amount is definitely mouth-watering, it really isn't worth the risk in my opinion.
You do you though. If you think the 6% is worth the risk, then go for it. Just take note that while the company is
probably legitimate, the funds they're holding being stolen is
NOT impossible. Or they might even pull off a Quadriga. 🤷♂️