The University of Utah health system has been advertising this type of special for years. Though I’m not sure it’s working all that well. Utah has the 4th highest fertility rate in the US.
The U’s campaign was called “Vas Madness”, unfortunately it looks like it was cancelled last year and again this year. At least their web page currently says it is cancelled because of COVID-19.
BTW, if you do a search for “Vas Madness” it looks like it is used in a number of places around the nation.