why allow people to put 0 dev fee and possibly make you no money for your hard work, which we all appreciate?

A coffin has no pockets... Wink

Do I understand this as you're ending development?

No, currently development continues...

EWBF_
192_7 for old card (GTX 970/980) improve ?

Yes, but I did not implement everything that was planned for this algo. In the next version there will be additional improvements.