One of the things Squid mentioned in the update was that business cards would be a rare drop from bosses!
I'm curious as to what that exact drop rate is/will be... and how people's grind sessions for it will go
If anybody's already gotten it to drop, or has done a lot of boss-killing without any results, etc, share it! (And also your results if you use the card too, I'd love to see!)
Personally I'm a bit busy so I haven't gotten to boss-grinding yet...
Edit: @Bear made a spreadsheet to help figure out card drop rate! Thank you @Bear!