1. This component is very high quality and already in use by major businesses: New York Times, The Guardian, Zoho...
2. This component is shepherded by a developer who is very well regarded in the open source community.
3. That developer has only received ~ 50% of his monthly target of Eur 5k.
Something doesn't add up.
My suggestion wold be to use AGPLv3 license and sell commercial licenses to improve the income situation.
However without closing the gap between the creators and monetizers this model can't sustain itself and the party will eventually crash.
Amazon or Google don't open source the main software they use make money from. Only supporting infrastructure software and research.
For a small company it's possible to open source the main product if you use GPL or AGPL.