It has everything to do with recruitment. Any one on the street will know with reduced flying and a workforce that can be contacted 24/7 for flying to get extra cash at this time will. It’s been available for years yes, but there was not much take up until the max grounding and the hours reduced. You can not take extra work flying 850-900a year now FZ pilots are at 400-500. Pilots barely ever get called off standby these days as crewing call VOFF rostered people.For anyone that does not understand VOFF it means volunteering day off. After the roster is published you have to fly your assigned duties. On your days off you can tag VOFF letting the company contact you for extra flying.(like standby). Lots fill their entire days off with VOFF in the hope they will get more hours. It can be refused if they do not like the duty. They do this while their colleges are on forced leave and it is also stopping recruitment.