The word stunt used as a noun does mean a feat of daring and skill but, even in that sense, there is a connotation of the feat being done to impress or entertain. For instance someone climbing up a tower block to unfurl a political banner might be said to said to have pulled a stunt but a winchman on a rescue helicopter dropping to the deck of a small boat in heavy seas to pick up an injured person would not.
The Lexico online dictionary gives a secondary definition of stunt as a noun which is
Something unusual done to attract attention
with the example
‘the story was spread as a publicity stunt to help sell books’
The Longman dictionary also gives a second definition of stunt as
something that is done to attract people’s attention,
especially in advertising or politics
with several examples including
Todd flew over the city in a hot-air balloon as a publicity stunt
A goofy stunt for February sweeps
He also knew the value of goofy legal stunts
Now flying over a city in a hot air balloon could fit the skill and risk definition but it is by no means a exercise of an unusual level of skill (particularly if you have an experienced pilot doing the flying for you) but many advertising or political stunts require no physical skill, in fact even standing in a public place dressed in outrageous clothing, carrying placards and shouting slogans could be considered to be a political stunt. In that case no physical skill is required at all.
Similarly the staging of a more or less outrageous social media campaign could be called a stunt but it requires little physical skill and little or no danger or daring.
It is much more likely that the stunt referred to in the quoted passage was something along the lines of an advertising stunt than a feat of daring and skill.