Perhaps. I suspect Tesla will always give their own vehicles a discount, but that's automatic and doesn't apply to us. I could maybe see the day when DCFC matures more toward the long-proven gasoline model (the same price for everyone). Gas has a few membership-like discounts sometimes too (like grocery stores pumps that give discounts for racking up purchases on their loyalty card), but that's not quite the same thing, and not nearly as widespread. And it's usually not a massive 25%. Costco and Sam's Club build in lower prices but don't sell gas to non-members at all.
Ionna has no membership discount and they're becoming the new standard. Walmart's new network is offering a 10% discount for buying their broader membership, but that's not nearly as bad. At 10%, it takes more like 3-4 charges to break even. But at 25% it often only takes 1, compelling me to have to get the membership and give up P&C.