I think a lot of the back-and-forth is due to disagreement over whether or to what degree the sky is falling.
In a general way, so long as EVE doesn't lose core elements of its identity, then efforts to increase retention or to promote activity are generally good practice. The source of the income-- whether PA, consumers, or historically other investors --doesn't really matter.
With the winter events, there's some stuff that's certainly aimed toward a revenue boost, but it's not exactly wringing the rag for every drop. The historical Christmas gifts are tied with logging in (I think that's happened before, so whatev; login bonuses aren't the devil); one of the gifts allows people to inject SP without loss of efficiency for a limited number of pokes (new, definitely is aimed at boosting the SP market, but doesn't materially change existing abilities); lastly, the log-in event has rewards for both alphas and omegas, and alphas that upgrade to omega can then get the omega rewards also. Aside from a bit of SP, most of the event rewards are aesthetic or small quantities of ammunition.
So, the usual holiday stuff has a new wrapper, and it's aimed at encouraging people to log in, subscribe, etc.
While we can certainly discuss the virtues of SP selling, my view is that so long as it's a 'pay money for convenience' thing instead of a 'pay money for an insurmountable advantage' thing, then meh. Whatev. The current Rorqual locusting in Delve is more of an issue for long-term game balance than SP selling. ;p