It seems pretty straight forward to me. From his post, I gathered that as far as Chivlet is concerned, the time gating offers no real benefit to the game (when it’s considered that we already have the resource gate and skill gates). That being the case, a time gate isn’t there for any particualar benefit, and an unnecessary time gate = opportunity to introduce micro-transaction, if desired.
Even if you discount that as reasonable logic, maybe he did a search of the forums and found (however old), this thread - Art: Mystery Box concept? Whether that’s the current thinking or not, it certainly shows at the very least willing to consider the direction.