Causes Cash

FREE as in beer

Yes! Zero percent fees for ALL cause contributions.
Well.. Similar to GoFundMe, which has to charge 2.9% + $0.30 for "processing" fees; incurs "processing" fees for its donation model.
Fees will NEVER exceed ONE percent
NOTE: GoFundMe also provides a 100% money-back guarantee. The effort will certainly be made, but not sure if that will be feasible for this decentralized platform.

Telr Exchange

All coin exchange services are powered by Telr Exchange; a service provided by Modenero.
Telr Exchange processes ALL coin exchange services with a flat-rate of 1.0%, plus on-chain fees (based on the coin used in the transaction).