For all of the business model evolutions and technology-led disruptions throughout the service economy in recent memory, the 6% realtor sales commission (a truly obscene amount for higher priced homes) for the most part has been unscathed. Tech upstarts like Redfin (RDFN) are trying to make a dent and are making progress, albeit slowly.

Public for less than 18 months after their IPO priced at $15, RDFN is using technology to save home buyers and sellers money. The company has been expanding its 1% sales commission structure rapidly, which can cut home sellers commission expense by 33% (4% vs 6%). Like Zillow (Z), RDFN also strives to offer customers ancillary services, such as mortgages.

RDFN stock had been trading pretty well, relative to the $15 issue price, up until recently:

The issue now is that RDFN was started in Seattle and focused initially on higher priced big cities for its lower sales commissions. The reason is pretty obvious; taking a 3% cut on a $200,000 home in Spokane is equivalent to taking a 1% cut on a $600,000 Seattle listing because each will take roughly the same labor hours. The idea that said Seattle seller would pay $36,000 to sell their house is a bit nutty, but that structure has largely survived in the industry.

Fortunately for RDFN, the coastal housing markets have been on fire, including double-digit annual gains in their home Seattle market for many years now. The result has been a strong revenue growth trend for the company, with 2018 revenue expected to top $475 million, versus just $125 million in 2014.

With those same markets now showing clear home price deceleration and inventory stockpiling, RDFN should see pressure on its near-term financial results, and likely similar headwinds for the publicly traded shares.

Long-term, however, RDFN’s future appears bright as it continues to expand its business across the country, taking aim at the traditional 6% sales commission structure. The company’s market share reached 0.83% as of June 30th, up from 0.33% in 2014. While that figure is tiny, it shows you just how much business is out there for newer players to steal.