I'm happy you thought about players who didn't have the opportunity of visiting planets and now are unable to visit them, but I don't think this is the proper way.
I have 1 Flux but I will not burn it because it will take ages to get back 1 flux again
I really enjoy the game, but I must agree that flux is way too hard to get. Also the crate to potion ratio on boss fights is way too low imho.
You could use this pool to swap scrap to flux :)
https://beeswap.dcity.io/swap?input=SCRAP&output=FLUX