Those players would be aware of where the Club's at, regardless of whether it was publically stated.
The older guys won't achieve premiership success any sooner at Melbourne, regardless of the focus - if we were to attempt a quick fix, we'd create a situation where there was no potential for those players to see premiership success.
The focus on youth is the only way we'll be in the hunt for a premiership any time soon, and if 27-28 year old players do look elsewhere for success, it may be a win/win for both parties.
If their managers couldn't tell that these players were our future without it being publically spruiked, they should be sacked by their clients.
Thus, I think this is a moot point.
Any sponsor worth their salt will investigate where a Club's at when they come on board, and on-field is one part - but not everything.
I'd suggest that Stynes' focus on youth, and references to his playing days, are an attempt to create a 'story' or 'narrative' about our current fortunes, which may help get sponsors involved.
Furthermore, there's no viable alternative, unless Stynes and CC were to blatantly lie about timeframes.