Countries have different strategies and procedure, but academic career is somehow similar: research publications, teaching, funds, awards. I mean academics do the same thing in all countries to be promoted in their academic career.
However, I see a big difference in membership of learned societies in the US and UK.
UK: Academics care about their status in several societies, Member, Fellow (particularly the latter), and always use the designatory letters after their name: MXX or FXX.
US: Academics only join one or two societies in which they want to be active. Fellow is rare, and no one can directly apply for that, still people do not mention it boldly.
Is really the status of membership in leaned societies important? For example, in academic promotion, research proposals, awards, etc?
Is it useful to join several societies (connected to your field, but you do not have time to be active in all of them) to reach high grade membership? Is it somewhat like an award to be listed in CV?