A church I attended many years ago had written requirements for formal membership (and therefore voting privileges) that included paying a 10% tithe. I was never a member there, and though I left because I moved, I would have left soon anyway as I had lost all respect for the pastor, mainly because of his expressed views on tithing.
Churches can establish any criteria they like for membership, and normally must do so to maintain their non-profit status, but that doesn't mean those criteria have to be biblically sound... that is up to the individual to assess. A legal organization (which a non-profit is) must distinguish between those permitted to vote and those not permitted. Of course, a congregation may avoid all this by not registering as a non-profit corporation.
Recently, I questioned the elders about the proposed wording of a section of our church's 'vision' document which addressed tithing. I wasn't given a clear explanation why, but the proposal was withdrawn soon after that. Had they pushed forward with it, I would have requested a meeting with the elders to discuss, and if they persisted, I likely would have left the congregation.