Earlier quoted context omitted.
I would hope they would respond with how they can -prove- data can never be sold, by having accountable cryptography, etc.
At this point, there is not much to e2e encrypt--as most of the time you're posting for the internet to see. With more personal collections coming, we'll introduce encrypted content as well. Although this has nothing to do with selling users data—will work on our tos to communicate our expressed intents more clearly.
I assume user produce emails, payment information, potentially other PII, behavioral data, how long each user reads each post, etc that adtech companies will gladly pay for.
If the system were open source, decentralized, and/or if user PII was end to end encrypted then you could prove you literally lack the technical means to collect or sell data.
All data that is valuable and technically able to be sold, will eventually be sold.