I'm thinking about integrating with siftscience. How trustworthy are they? It looks like you need to send them information about your users and give them script

I'm thinking about integrating with siftscience. How trustworthy are they? It looks like you need to send them information about your users and give them script access on your page in order to help identify fraudulent transactions. (which is completely reasonable but still requires a lot of trust on our part)