Ask HN: How do you get marketing and sales decision makers talk to you?

I am reaching out to them on LinkedIn and clearly stating I am doing product research. In some messages, I mention that I am not selling anything.

I get mostly I am not interested reply from sales execs, whereas VP of marketing or director of marketing never reply.

How do you get these people talk to you?

We are boostrapping a SaaS targeted towards Sales Reps but it is SO SO hard to make these people talk to you.

I have offered Lunch and coffee as an incentive. However, reply rate is so damn low.

I would love to know strategies that worked for you.