I think the point made above was that you shouldn't care if they use your proposal/design as an RFP because you ALREADY billed them for just the proposal/design.
When I worked as a consultant doing software customisations, they were always done in (at least) two statges. Proposal and design work was a separate contract from implementation. It was made clear to the client they could go elsewhere for implementation. They rarely did.
When I worked as a consultant doing software customisations, they were always done in (at least) two statges. Proposal and design work was a separate contract from implementation. It was made clear to the client they could go elsewhere for implementation. They rarely did.