1. Why not inhibit screen-captures or make them more difficult to share ? - that's a minimum requirement.
Available from other platforms like Adobe Cloud without additional cost.
This is available in the base platform. e.g. Safari and iPhone iOS can prevent pictures of payment information, or prevent them from being included in other documents.
2. It's too easy for someone to use a fake email, and too hard to personalize passwords per person within recipient company. This defeats the ability to track who exactly is opening the document within a recipient company.
Instead, propose : Enable access based on any validated email account, within a domain, without password. i.e. send recipient the descend link, recipient enters email into the given docsend link, an email is sent to that email account with second link. If the click on the
3. The smarter business model would be to make all higher level features available individually, but to make the Standard or Advanced packages cheaper than the sum of the individual features.
This is what Salesforce, Survey Monkey and many others do.
4. Since Docsend has failed to match the abilities of Adobe Cloud in preventing copy of content, it should at least Automatically add watermarking to ensure taken content can be tracked to the source.
5. Some items that could be useful require the more expensive package - why not make NDA option for base package users as an add on ?
6. Enable and enhance the viewing of certain revisions. Upload one document, but enhancements only visible to certain enabled or new recipients. This allows continuous revisions without having to split releases into separate documents. Review collected by and hosted on G2.com.