They seem to be very high volume and low pressure.

Neither are easy.The stuff you're seeing from wholesalers is likely the stuff all the higher volume buyers have passed on.

That’s how AirBnB makes high volume hosts feel every day.

Apart from very direct advice, it was great having someone with high-volume flipping experience walk each property with me because they could scope out what needed to happen and typically were aware of recent pricing. 

One rehabber will do a roof for $8k while another can do one for $5k because they have a roofer who cuts them volume deals, etc.As a wholesaler my job is marketing for deals, providing good info to the buyers, and letting them decide on a price that works for them. 

But at best I'd expect a high volume outfit like this to be able to deliver retail/average deals.

Depending on your goals and the volume of deals you are seeing that you'd consider a "buy" , it might help you scale faster. 

The very interesting and unique factor there is sellers not accepting discounted pricing to sell on a level of volume to move median home pricing to decline.

It's about making money on volume, not on one deal.  

Economies of scale are one of the biggest reasons TK companies are able to handle bigger volumes than an individual fix-and-flipper.