We talked about this before but its not really free its built in to the cost. Instead of price reductions you get the extra time.
The benefit to
DVC is they are preselling the resorts, can start to flip some of the 2042 inventory (which there will be plenty), and they are able to recognize some of the revenue immediately since there is a 5 year contract as part of the deal.
Yes the points will be free in 5 years but I suspect the buy-backs will be in line with the incentives they would roll out anyways (possibly cheaper). With 5 years left you will have new resorts selling at like $300/point possibly and these resale contracts going for $25/point ($5 per year)? Just guesses but at some point the ROFR math will work out in favor to doing a ROFR and giving the time away as the discount instead of discounting the direct price.
Also no clue how Disney does their accounting but doing a ROFR and selling 50+5 year contracts at full price might look better on the books than selling a 50 year contract for a discount off full price.