This is just my hunch as I work in analytics and deal with cookies a lot but both Salesforce and Atlassian appear to intentionally trade off the third party inc

This is just my hunch as I work in analytics and deal with cookies a lot but both Salesforce and Atlassian appear to intentionally trade off the third party inconvenience because their products are enterprise (you have to log in for work) and they rely on upsell/cross sell across their products which they host on different top level domains. So forcing the third party cookie helps immensely with their sales and retention, and doesn't hurt usage because it's often required for work and if you need to work around it, you usually can find a way if you are so inclined. If they had used the same domain for their products historically and just separate subdomains they wouldn't have to make this trade off, but it probably also helps with third-party ad networks/segmentation to get folks to turn it on anyways.