I'm a member of IEEE and have been since 2008 ish?
I started in college since the student chapter paid half of the fee - so I only had to pay 16$ lol.
And having student members be actual card carrying members of IEEE was the only way the department would give us money.
[Though come to find out, we should have been requesting money from the Green Mountain section and getting support that way. BUT I DIGRESS].
I held leadership positions in the student chapter and almost every year as a professional as well.
I've been secretary, treasurer, PACE, member-at-large for either the section as a whole, an affinity group, or a technical society.
I've stepped back from being involved with the overall section and I'm focusing on my technical society.
My company pays for my membership and they're a lot more likely to send me to conferences as I'm in leadership roles. Plus it's networking with folks in my industry.