We here at Old Twitter value your privacy, and take any concerns you may have with your own data, and what we do with it. The data that you put in this site stays on this site, and is not used for anything other than accessing the site. We don't do anything with your data like selling to third party companies, or use your data for algorithmic or tracking purposes.
Absolutely nothing. This site is a fan project we have no interest with your data or making money off of it.
To find out more information about Old Twitter feel free to read the FAQ