This is good to know! I had not realized that there was a minimum (466 is a weird minimum, too - I'm used to 500), but on the East Coast this will likely have a non-trivial impact on my earning strategy at some point. This also explains the two numbers - 698 was as no-status while 768 was as a Silver. This presumably means that if I get to Gold the floor will rise to somewhere around 873 for a cheap F leg since 466*(1.5*1.25))=873.75.