The way I understand the system, if an SVN owner deposits their week in II, then SVN was required to deposit a comparable week into II for other exchangers. (Similarly, if an owner converts their week to SOs, Starwood is supposed to make a surrendered week available for SVN exchangers.) I mean, that intuitively seems to be the only way an exchange system could work, no?
I can easily believe that in years' past, Starwood deposited more weeks than they were required to deposit into II because Starwood saw it as cheap and easy way to market the resort. But the extreme swing, from feast to famine, seems very odd. I mean, if a Starwood owner (with priority in II) cannot get a fill for a low season week with a deposit from a year out, then it seems to suggest that something else is going on here.
I know that a few years ago, someone discovered language that suggested that Starwood could deposit a week from ANY resort into II, but I can't find that thread. If that is the case, then that would explain a lot. But with no transparency, it's hard to know.
I do know that if things continue, then voluntary resorts will suffer disproportionately. And they are already at a disadvantage.