ASK HN: Would app developers pay for a copywriting service?

BACKGROUND

I'm thinking of setting up an agency that just focuses on copywriting for app developers.

I'm interested to find out if this addresses a real problem. The broad assumption being that developers generally find it hard to communicate the value of their app online.

QUESTIONS

-- Feel free to answer any question that interests you.

Q1. Would you pay for a service that specifically helped you as developer sell your apps online through better copy?

Q2. If so how much?

Q3. What kind of package/service would you expect?