Is the biggest threat to this project that Ethereum might not be able to scale to handle the amount of transactions/API calls that $Hydro will require with increasing adoption? Could someone point me to someplace this is addressed?
We are very cognizant of the current Ethereum scaling limitations. There are 2 main ways this is addressed in our overall project plan:
1. We have architected our roadmap to start out with features that use the lowest transaction volume. The transaction load we would put on the network with the initial Raindrop release, even at large scale adoption, is fairly low compared to other projects at similar scale. Future Hydro products will come with heavier transaction load, but we will have an opportunity to see how Ethereum scaling solutions (e.g. Casper, Raiden, etc) are progressing over time.
2. Hydro is generally platform agnostic. We are building on Ethereum right now, but have already considered how to replicate the functionality on other blockchains such as NEO. As new platforms emerge with smart contract capability (e.g. Cardano, EOS, Waves, Ark, IOTA) we will analyze their suitability on an ongoing basis.
Overall we are confident in the Ethereum ecosystem since it is the most mature, but we are prepared to shift in order to achieve larger scale adoption.