Well, I doubt the not sending it back is because of customer service (they were kinda surley to me on the phone, but the repair work was good and reasonably fast), even if I know the post was more tongue-in-cheek about EAA's stellar reputation about warranty repairs.
A-75's have a simple trigger and have relatively few parts overall. They are heavy and and undoubtably well made. The fact they were made completely in Spain and were sold under their Spanish brand name (instead of EAA's cheesy naming department, which must be farmed out by Century, come on, Bounty Hunter? Witness? ughhh, if I didn't like my Witness so much...or, if only they would have picked a better name in the beginning, or used more tasteful advertisements...but if a bull frog carried a switch blade, the moccasin wouldn't eat him, as my dad used to say...), and quality control in manufacture was probably better than EAA generally provides themselves is a pretty good reason why they might be repaired less often.
Though I suspect the real reason is that most A-75's out there are now secondary purchases that are no longer under warranty (because of original ownership) and thus qualify. Also, with only 100 Inox's imported, one would expect a much lower number of returns based simply on the small number.
Ash