Good stuff here already but yeah, rule of thumb "if it seems too good to be true / terms and rates much better than competitors" its likely a scam. 

SmartZip is a competitor of theirs.

I've been sending to this list for 8 years & have had a ton of feedback (& have seen some of my competitors adv).

You can check all this stuff on AirDna and analyze how the competitors are doing nearby. 

You cant swipe right on everyone lol.

What I would do is take the time and look at each and every competitor listing to get an idea of occupancy and nightly rate and plan accordingly.What is your plan for the STR?

In our America, with black guys using magic no-shave powder, bouffant and limp-locked blonde and mouse-brown-haired men who get away with one careless swipe at their whiskers with electrical contraptions, and Asian/Latino guys who are actually able to successfully use a dab of the perversion called "shaving gel" to remove the irregular wispy growth from their baby-soft-skinned chinny-chin-chins, the grim morning ablutions of the true warriors of the beard now often pass unremarked.Dang!

Like what others said, you can copy what the competitors are doing in the area, but sometimes it's good to let a pro do it!

Therefore, if you have the best 4 family on the block and your rents are 3x as high as your competitors on the same block, you do not get rewarded when you sell for your good management.

Now.. where the uncertainty comes in is here.. if your competitor does it better than you you won't make it.. but that is not SEO's fault nor does this make the definition of SEO unpredictable... no!