The growth rate of the payment is 2.9%. This is only very slightly higher than inflation, on average.
Also, assuming that the lower home value came true, the original purchaser of the solar installation did put his money where his mouth is, and paid a financial cost to his environmental interests, which is the moral thing to do, regardless of whether he was "tricked" by the negative cash flows showing up in later years (and in this case, when he was dead).
I guess my main point from my multiple posts is that there is no free lunch. If the fully amortized cost of solar is higher than grid power, someone will have to pay. Someone with buyer's remorse, who fully understood the cash flow implications at the time of purchase, can still feel like they were tricked. And maybe, the pessimistic projections of grid power costs made by sunrun should be taken with a grain of salt, and it should also be acknowledged that this deceptive practice is helping the planet.
Maybe a game theory perspective is valuable here- assuming cooperation is possible, people place an irrationally small cost to global warming, and discount future costs (in this case, of their power bill) to an irrationally large degree. The way to get people to cooperate is to trade one irrational impulse for another.