I like this idea-
however, it would only really flourish in large servers with ATLEAST 15 people on each team IMO.
In a room where its 5v5, or 6v6, then BPs should be slightly cheaper, since to noobs like me who struggle to get 10 kills in a game, every evo/wad of cash is precious, and I would be at the very least reluctant to hand over 8 of my treasured evos just for a extra acid tube.
However, once again, in rooms where there are a lot of people, this could really take off if every person donated 1/2 evos or 175/350 creds.
I like this idea a lot though.