I moved my TOTP's from Authy to Bitwarden, where you can have access to your seeds and export if you want. But I believe this requires paying the $10 per year for Bitwarden premium (which I already had).
I don't really have questions about OF beyond getting context for the billboard. In the US I don't see porn stars advertising in such everyday places. I have certainly seen billboards that are similar to the one shown in this article, but those are from companies with a big advertising budget like Victoria's Secret, as you mention. I think porn stars are generally not wealthy enough to have a big advertising budget for billboards.
I moved my TOTP's from Authy to Bitwarden, where you can have access to your seeds and export if you want. But I believe this requires paying the $10 per year for Bitwarden premium (which I already had).