I believe this could be used as a marketing stunts as well as helping others at little to no cost due to the afflux of new people with strong morals and ethics that will find ReFi even more pleasing.

I consider 1% of Taxes ( so right now 1% of 12%) is enough and it could be donated to any crypto-based charity like Angel Protocol

This could then be clearly stated somewhere on the landing page which would serve as one more reason for those in doubt to finally take a step and join ReFi

Another approach would be to lock 1% of the total tokens on one of those protocols, but i believe this approach would be somewhat more expensive for everybody and maybe not so well received for the community.