Hi Bram,

Good question and a question you are more than welcome to ask on the Gulden slack #GAB channel as you will get feedback from the wider community and the #GAB can also comment.

Will also try explain the current situation:

Due to the implementation needing to be required on blockhut their was no need for the GAB to be involved unless funding was needed directly from the community. Currently the development reward is not covering the costs associated with Gulden. Please refer to the following link
https://centure.com/maintaining-gulden/

15000 Euros per month requires a price of slightly more than 1.3 Euro cents and when the block reward halves in 3 years it will be 2.6 Euro cents + inflation

Our costs -- What is not mentioned on the site is Gulden has 2 additional contract developers. 4 in total at this stage.

Two full-time blockchain developers for applications Web development and graphic design
Servers and hosting
Security
Development
accounts for applications
Software and font licenses required for development and graphics
Communication software
Administration
Legal


Back to your question:

Portion of the bitvavo funding has been used to hire an additional developer. The community had mixed reactions to this as Gulden also needs the funding for additional exchanges and / or payment processor services. While I would love to have the btc (+other crypto options) payments available
through the wallets straight away this is the current reality.

A sustained price of 2 Euro cents is required, the higher the price the more can be done.