A marketing strategy would be to ask shop owners directly if they are willing to provide a small discount for Pinkcoin customers.

It might be out of the comfort zone of a programmer to call vendors but this would be an ideal task for a marketing student who tries to gain some experience. Does anybody here in the forum know some Marketing students?

There was some indication of the developers to integrate pay-with-pink for a little fee or even for free into an existing website if the shop provides a a small discount for Pinkcoin customers.