Exactly by dripping it out we can give each crumb the proper examination. Even small details have some big revelations. For example "twitter censors call themselves OWLS". If it was all dropped at once it would be just a wall of text.

How many took the time to read through all of the emails when they were dropped at once?

https://www.news.com.au/finance/work/leaders/wikileaks-drops-thousands-of-emails-from-the-clinton-campaign/news-story/684a0712a86cc91edc51dd592143f336

On Friday, Wikileaks published 2050 emails that could prove damaging for the Democratic candidate’s campaign.

The enormous data dump focuses on John Podesta, head of the campaign, who also served as President Bill Clinton’s Chief of Staff from 1998 to 2001.

And how many looked through the cliff notes?

What if instead they released it drip, drip and spread it over months so people could digest the damning revelations?

Drip, drip does more damage as it spreads out the pain and gives people more time to look in depth at each crumb.