These reviews ignore the simple fact that a small equity interest in an IP can be highly leveraged for little cashflow risks. This is reflected in the high ROI numbers. You can buy an IP for $5,000 down and $40 a week. It can generate +CF and tax benefits. It only "loses $" if you sell. It doesnt matter iof its value falls unless you actually sell.
Its no different to the false assumption people make with shares. There are many shareholders wh0 bougt CBA shares for $5 who earn $20 a year in divs now. They dont give a rats if the price drops 40%. They still earn 400% yield. $550% with franking credits. The yield doesnt change if the share drop 50%....