People are saying there was 20,000 codes, and the early access queue had multitude more people than that trying to log on in the first minute soon as the 6.0 patch dropped.

There's talk that the codes are gone, which that in itself is sort of messed up. Moreso since the promo has a run-time of a week.
That and the fact that the promo didn't start until 4:30pm PST and a lot of people in America don't use PST, making the window and chances to obtain a code even smaller for people on the opposite side of the country.

All the places I check on my app in this area are closed fairly early due to COVID-19 restrictions and labor shortages.
When I checked at 9pm EST,(I personally think is a reasonable time to order dinner. Would have been 6pm PST), there were no places available to order from that were open.
It's fairly disheartening to hear that such an emote that people have been searching for quit a bit for was locked behind a two-hour time frame and is no longer available on Day 1 of a promo that was supposed to last a week.