I guess their problem is the rate at which new bugs come in.
Here are some numbers I've just pulled out of radar:
9622791 Jun 16 2011
14335281 July 2nd 2013
That's 4,700,000 reports In just over 2 years. Or 250 reports per hour. Every day. Seven days a week.
14247832 Jun 24 2013 07:41 PM
14249639 Jun 24 2013 09:32 PM
That's 1,800 reports in 1:50 hours. Or 1000 an hour. That's probably the iOS beta peak.
Holy! When OS X development changed in 2010 to mirror iOS development, lowering membership to $99/yr from $499 and $3499, it seemed a great idea to bring in more MAS development. I assumed most [new developers] wouldn't bother bug reporting, instead focusing on their app's.
Apple drops price, changes name of Mac Developer Program
I don't miss the membership prices, but I miss OS X development pre-10.7; biweekly/weekly beta's that required a clean install to ensure third party app's, etc weren't "outliers" in debugging. Plus beta's seemed to offer a few surprises along the way (loved 10.5's "iChat" feature "Answering Machine" for video away and recorded messages, should use it for iMessages, great for the deaf).