How will future revenue be generated to ensure growth and returns to investors through growing the token value? Will this be from private investment, selling the correction data service or elsewhere?

Selling the correction service and related services to the GNSS industry and the users of GNSS is #1 for sure.  The rest is a supporting role.  There is a nice market report freely available on GNSS here.  GEODNET is a disruptive augmentation service.  The market is well described.   The whole market is show on page 11 with a break down between market segments.  Augmentation is big category at roughly $20B and GEODNET hopes to be a category defining service.