No, there is no expiration of subscription commissions. Having started converting customers to subscription prior to the c/cloud renaming, and almost all now converted, these commissions have become a substantial part of our revenue. Besides taking away our incentive, if eliminated, it would decrease our profitability. For the top resellers, this would be an even greater affect, and they have told Sage this.
Unlike the original subscription terms where the commissions reverted back to Sage after an ROR, the commissions do transfer to the new partner.