Just logged in to find an extra 11GB in data added to my 1.5GB Unlimited Plan. Checked on another account (with the same plan) and it also shows the extra inclusion.
Can't find an official mention anywhere, hence the link in the OP leading to the main page. It's most likely due to COVID-19 and its impact on their call center based in Manila.
confirm same on my accounts all have had 11gb added