There are several reasons why researchers might opt for the cracked version of FlowJo 10.5.3 on Mac:

Scientific journals demand transparency and adherence to ethical standards. Publishing data analyzed with pirated software violates institutional policies and journal guidelines. If a publisher or university audit discovers the use of unlicensed software, it can result in the rejection of your paper, retraction of published work, or the loss of research grants. Safe and Legitimate Alternatives to FlowJo Cracks

BD Biosciences (the owner of FlowJo) can pursue legal penalties against institutions using cracked versions.