I have already made a tons of concert recordings and never and ever wanted to make a "trade", which is way selfish IMHO. I was happy with that lot of people enjoyed the recordings for absolutely free and without any thanks.
It may be selfish and I would love it if everyone would just upload their recordings, but it doesn't work like that. Sometimes the only way to get recordings is to make a trade. It's unfortunate, but that's how it is.