Basically what it says is that while Yated Neeman publishes advertisements for various investment/real estate schemes they takes no responsibility for the trustworthiness of the people involved nor do they take any responsibility for the issurim of taking interest etc. that may be violated. The responsibility rests on the investors to investigate.
Imagine what would happen if Yated would take such an approach to restaurants or food products, or women's clothing. Imagine if they said the restaurants that advertise here may be treif, it is up to the consumer to check them out. There would be such an outcry that they would be forced to stop taking such ads until they checked them out. Yet in monetary matters, no one cares.