I have on occasion traded bud for a nice ball of resin. When I went to uni last year I flipped with my roomie after he cleaned mine and his bong and threw all the resin in the bin. He was like 'it doesn't do anything its just rubbish' following week i scrape my bucket and give him a try and hes never thrown it away since.
Resin is one of the main reasons i love my bucket so much, other than better efficency (cant afford a vape, i know its the best) collects lovely resin that you don't get with joints and blunts. Its like recycling :D