OK. How, exactly, is that different? Lenders pay for our reports, with both the lender and the appraiser being fully aware of the permission given related to the data in the report (similar to my MLS agreement).
If appraisers wanted to profit from re-sale of data, then they should have jumped on the appraiser national database back in the late 1990s, but they rejected that idea. They were even told back then that if they didn't create a national database that Fannie would, but no one wanted to believe that.
I don't spend a lot of time thinking about this issue so will give a fast off the cuff answer...seems like this suit is more about preventing others from re selling our data ( beyond data our opinions/conclusions ) outside of the intended appraiser/client/user distribution (including data collection agencies ) we agreed to in a URAR, rather than appraisers trying to make $ from re sale of data. But I don't know on what grounds the lawyers might base a suit ...I'm not a lawyer I just play one on TV...(lol...I love the ad for TV doctors on TV....)
As far as how it differs from our agreement with MLS, already explained it , when I pay for MLS yearly I sign to abide by an agreement with them where I can use MLS data in appraisals, if I went outside that agreement and started re selling MLS data to other parties or using it to get listings etc ( a use outside my agreement )the local board and possibly NAR would be all over it....
I think the word "data" is over used in appraisals as a catch all term. Nobody "owns" certain data...much of what is on MLS is available on public records. Data to me indicates a bunch of facts (whether correct or not) about a property, facts that can be available from multiple sources. Look up a property now on teh internet by address and a bunch of possible data sources for it pop up- from NLS ( which is paid subscription but agents paste the info on internet), to public records to Zillow etc.
What is called "data " on appraisals can just be data, but also be something more...incorporation judgments and opinions and efforts in vetting and verification. That is appraisal results, not just "data" so what is a " data collection agency" collecting, or acquiring and then re selling, ( or used to replace appraisals in their own proprietary product of an evaluation or whatever they call it..)
Again, when I abide by my agreement with MLS, I use their data ( half of which is wrong anyway ) on my appraisals, I am not re selling it or using it to compete with them in RE sales or listing effort.
Is a converted garage to bedroom adding to the living area SF? Appraisers's "data" on that might include their opinion from personal inspection, and MLS might say different sf and public records/tax assessor different.