You might not need to use this. One-time pad systems are inconvenient, because of the difficulty of pad generation and exchange. There are many easier cryptography systems out there. If you don't have a reason to use this, then don't.
OneTime could be handy in a few rare situations:
You're not completely confident about the provenance of GnuPG on your system.
To bootstrap trust: i.e., to have a reliable fallback method for exchanging other, more convenient keys.
To have an encryption program whose code is small and simple enough that you can inspect it and understand it.
To throw a little diversity into the surveillance stream. Bots are watching for & saving messages in the popular encryption formats. OneTime makes 'em work a little harder! :-)
I'm not really sure who's using this program nor why they're using it. I get enough bug reports and feature requests to be confident that there is a user base, though, so I continue to maintain it.
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