You can't compare someone like Rijk who has a full time job to other founders who can work on their projects full time. Bitvavo listing will change the course for Gulden and with a higher stable price Rijk can quit his job and put effort into Gulden.
What price is needed for Rijk to quit his job and put 100% effort into Gulden?
Don't quote me but from what I remember on slack when the reward change was discussed. +- €0.04c and the development team can be permanently on Gulden, including Rijk.