but when you try to exit HBD a good portion of it just gets lost to slippage.

0% slip if you just convert the HBD directly into Hive over 3.5 days.

Over the last 10 years the S&P 500 made an AVERAGE return of 15%.

So to say that 15% is an "okayish" deal even though it's a guaranteed 15% with way less risk than the stock market... it's an amazing deal. It's so amazing people on the outside take one look at it and automatically assume it's a scam. That's how good it is.