I also think it’s early adopters of the new technology that are able to leverage people having a smart phone and eliminate the need for STR property managers that used to scrape 20% off the top, which thereby puts owning small properties being used as short term rentals back in the profitable space again.  

I went into my PM brokerage account (using my smart phone) and placed a simple trade at noon today.

They have something like 40-50% of the US smart phone market. 

everyone has a smart phone. 

(You also know that you can buy the ever-coveted "smartphone" for like $40 from Walmart, right?)

Internet isn't an issue, as 95% of the adult population have a smartphone with data  

Either way that's pretty cheap, although I don't own a smart phone so I can't download the app ($15/mo for my plan haha).

A pay as you go flip phone or free 'Obama' phone will let you get calls and make calls, no 'need' for the smart phone. 

@Anthony Gayden I'm trying to download the podcast from this application which is on my smart phone.

You need to have access to your smart phone and check your property regularly.