They will produce as long as requested ... and maybe a little more.
As far as i read the licence is not limited, the company is building, the quality is good.
I know in my personal environment at least 4 guys who ordered a TBL within the last week.
I guess there are 100 or more pre-orders and right now it looks good for DP.
TBL is a Bummer, need some more software but in it all a very great pinball that has not to hide behind Stern, JJP and all the other smaller producers.