This is the right way. Never say No but also don't just say Yes. A lot of times B2B customers are just doing a checklist and once they hear that it will cost more, they would drop it. I have been asked for escrow by customers paying $299/mo and I laugh internally first and then tell them "For escrow, you will need to be on our enterprise plan starting at $xx,000 per year with a minimum 3 year contract. let me know if this is something you would be open to". Usually crickets after that.