With an intelligence network so good they have been compared to the CIA, Thai street vendors are often first on the scene at "guerilla" democracy protests in Bangkok, where they hawk sour pork and fishballs to a democracy-hungry crowd.

After a government crackdown last week, protest groups have begun keeping the venues for their demonstrations demanding the resignation of Premier Prayut Chan-O-Cha secret until the last minute, in a bid to outsmart authorities.

Protesters have quickly noticed that they are often second on the scene at proteste venues, behind food vendors setting up their carts and readying themselves for a busy night Protesters have quickly noticed that they are often second on the scene at proteste venues, behind food vendors setting up their carts and readying themselves for a busy night Photo: AFP / Lillian SUWANRUMPHA

But protesters have quickly noticed that they are often second on the scene, behind food vendors setting up their carts and readying themselves for a busy night of brisk sales.

Meatball seller Rattapol Sukpa says he stays ahead of the curve by monitoring Facebook for hints of the latest locations, and is in constant contact with other vendors who tip each other off.

Grilled sausages, hotdogs, soups, cold drinks, pickled fruits and satay sticks are just some of the snacks on the menu Grilled sausages, hotdogs, soups, cold drinks, pickled fruits and satay sticks are just some of the snacks on the menu Photo: AFP / Jack TAYLOR

"My earnings were good before, but selling at the protest sites, you'd sell out faster than usual," the 19-year-old told AFP as he set up near Victory Monument.

Business has been booming since the protest movement kicked off in July, with the vendors now a regular feature on the sidelines.

This picture taken on October 21, 2020 shows pro-democracy protesters eating meals from street food vendors during an anti-government rally in Bangkok This picture taken on October 21, 2020 shows pro-democracy protesters eating meals from street food vendors during an anti-government rally in Bangkok Photo: AFP / Lillian SUWANRUMPHA

A post calling on people to come and rally at a new protest venue on Tuesday carried a picture of a food cart with the caption "Let's send the CIA there first".

The bonanza has also given Rattapol a better work-life balance, he said, enabling him to sell out his entire cart by 8 pm instead of the usual midnight closing time.

Thailand's anti-government gatherings also have a food festival vibe Thailand's anti-government gatherings also have a food festival vibe Photo: AFP / Mladen ANTONOV

Protesters are calling for serious changes to Thailand's status quo -- an overhaul of Prayut's administration, a rewrite to the military-scripted constitution and reforms to the kingdom's unassailable monarchy.

But their gatherings also bring a food festival vibe.

Dubbed 'The CIA', Thai street food have been a regular fixture at the recent outbreak of anti-government protests, with vendors often rushing to protest sites even faster than the protesters. Dubbed 'The CIA', Thai street food have been a regular fixture at the recent outbreak of anti-government protests, with vendors often rushing to protest sites even faster than the protesters. Photo: AFPTV / Jonathan KLEIN

Sour pork and rice sausage balls, a delicacy of Thailand's northeast provinces, hang like beaded necklaces from a street vendor's push cart, ready to be fried up and served with cabbage in plastic bags.

Also on the menu are hotdogs, soups, cold drinks, pickled fruits and satay sticks.

Some vendors have their cooking stations attached to their motorbikes, making it easier to high-tail to the rally zones.

Selling food to captive crowds often numbering in the tens of thousands is increasingly lucrative, said Anucha Noipan, a fried chicken vendor who used to make $97 a day.

"But since I've started selling at the protest sites, I have doubled my income to about 6,000 baht ($192) a day," the 21-year-old said.

New to the scene after leaving a job as a rubber farmer, Anucha says he agrees with the movement's demands and wouldn't sell his crispy fried chicken at rival rallies fronted by royalist supporters.

"I do not think I have the same point of view on politics with the Yellow Shirts," he said, referring to a term used for the pro-monarchy bloc.

Tensions ratcheted last week, with police deploying water cannons against protesters in Bangkok's central shopping district, drawing widespread condemnation from Thai society as images of the attack pinged across social media.

As his chicken thighs sizzle in a frying pan, Nattapol Sai-ngarm said he is conscious of the risks of doing business in such a dicey environment.

But the economy's freefall in the face of a coronavirus pandemic has left him without a choice.