"Hi, I'm building <X> and I'm trying to understand the industry's pain points better. Would <solution> be helpful? Is there something else that would be usefu

"Hi, I'm building <X> and I'm trying to understand the industry's pain points better. Would <solution> be helpful? Is there something else that would be useful to your business?" Something like that. Ask specific questions if you want answers. Make it easy for them to write a one- or two-sentence reply and you'll get paragraphs of valuable information back.