So what's the deal about meeting attendance??
Accountability, monitoring, inventory . . . the Witnesses used to be the sales people, now they're the customers. The only way the Society can close on them is at meetings and rallies. The Society closes for acceptance of their own authority, they close for volunteer labor to work for them, they close for donations to be sent to them, they close for submission to their speculations, and they close for a commitment to attend the next meeting.
Meetings are a capsule of customers who being sold, and sold, and sold . . . It'd be a little like a Tupperware club with two 2 hour sales parties a week without the snacks and without the coffee that required attendance or your parents, your children, and your friends won't talk to you again. One difference is Tupperware makes sense, and it's useful.