We will have to deal with this sooner rather than later. In the meantime we are de-emphasizing the term "member" in marketing (preferring generally just "maker"). We also use "key holder" more and more because a "member" may not necessarily have a key, even though that's not a function of the amount they pay.
Philosophically (and since we are incorporated under the Companies act, not the Societies act, but as a non-profit Company)... answer the question "Who is a shareholder?" Who (jointly) owns the laser cutter and the lathe? If not limited, who's on the hook for unpaid rent? Who could go to jail if the company/society breaks the law?
If the lower-tier members are shareholders, then they get a vote. If they are "users/customers" of some sort, then they don't.
To further muddle things, I am a member of the local Co-op. I am a "member" of Costco (yes, they call us "members", and I am a member of MEC and REI. All of these use the term "member" to mean different things.
"Member" isn't defined in our articles of association and the way it is defined in the Act isn't how most people use the word.
Amending your bylaws may be easy or having "members" and "guests" or "associates" (avoiding "associate member" as a term).
I'd be happy to hear what you settle on.
Byron
Calgary Protospace