social media / real estate listing shift

Interesting social media/real estate listing shift: Some local builders with the hot modern product that they now can’t build enough of are creating Facebook pages on which they will first roll out floor plans and pricing. One must either frequently visit or “like” the page to get the most current information. If the past few months are any indication, the homes may sell before ever hitting the MLS (and subsequently populating to Windermere, Redfin, etc.). What do you think of that, r/e agent friends and normal people (r/e consumers)?