You mean, something akin to a multi-use download code? We don’t offer anything like that right now, but we might some day down the road (no ETA yet, though). You can set up one-use redeemable codes for digital tracks or albums following the instructions here.
Bandcamp Support is experiencing an unusually high volume of emails from our wonderfully successful fundraisers this summer, so our responses may take an extra few days. We put together a list of common questions to help you help yourself in the meantime - power!