This is my first post here and I am not trying to start a war, but what you are saying makes very little sense for a 2007-2008 world.
1.) Why wasn't there at least a thin client when version 7 rolled out? Since version six what we have been lead to believe is they are focused much more-so on inter-office workgroups than they are the small development company. You cannot possibly tell me that if they were to release a thin client even in the price range of $100.00 a pop that there would not be a huge demand for it from corporate environments. I personally know of a rather small organization (in the scope of what is large and small) that would purchase 250 licenses for a thin client in a heart-beat. To me not having a thin-client now that we are at version nine boils down to them being just a bit greedy on what they expect from business consumers and corporations. They do not now, or have they ever had an efficient pricing model for their so-called target base, which is inter-office corporate.
2.) When I was a whole heck of a lot younger I was with a company that developed FileMaker solutions for transmission shops back then the price to get in with the solution itself was 3-6k not counting the required FileMaker licenses. Eventually this company was bought out by AAMCO and now their shops are paying even more of a premium to use the latest version of this solution under the umbrella of one of the largest national transmission shops in the United States. To get to my point (and still being very close with my former boss now department head over there) they would gladly pay FileMaker 100k to get a networkable runtime (which is nothing more than a thin client...) for 1,000 seats.
So, from the perspective of being your small time developer - no they would never make any money, but any huge corporate environment that was considering the system... come on now! Sorry, I hate to say it because I love FileMaker and I love Apple, but even though they govern themselves they still have the Jobs pricing syndrome, which is a very high premium for a nice package - but not much room to move at all if you want a cheaper model. (It doesn't exit)
In today's day and age you cannot be the BMW of the RDBMS world and continue to grow because the free alternatives out there are not like they were with a 1998 pricing model. Will it effect them today, no. Will it effect them tomorrow? I believe so.
All thats from someone who has been using the software for over a decade and continues to develop in it every day!