Almost has to be price or advertising right?

And it's super cheap to advertise there (you pay a listing fee rather than a cut of each booking.)

A few years back, you could walk on the streets and see billboards advertising large rental returns guaranteed by the developers.

I looked into passively investing then but after doing my due diligence on the homes that they were advertising, I felt that they were charging more than the homes should have been valued at. 

But you will need to get this from true private money sources, not really advertised online. 

Also, is it really everything its advertised on the call and in the marketing videos?

If a group of very wealthy businessmen pool together 250 million and start lending on unconventional loan products such as bridge loans and DSCR loans can they advertise as "Private Lender"? 

There are still deals to be found off market and even some publicly advertised like the one above.

I just purchased my first rental property and my first home as well witch means I am hoes hacking a duplex any ways its been 2 weeks since my agents company has been advertising the unit and we haven't gotten any serious inquiry's .

Yes, the worst agents will be advertising some low fees on their end.