Hi, we run LinkedIn advertising daily for both for ourselves and clients so have a good gauge of what works. Firstly massive respect and kudos for getting out there and doing it – I know how tight budgets can be in this environment! LinkedIn is indeed a great place to target CEO’s and directors, but with this certainty of the right eyes seeing your content, comes a significant cost over platforms such as Facebook. A typical CEO click is likely to cost you in the region of $10. So take a $200 ad spend and you might get 20 clicks if your content is good enough – max 40 clicks if your content is fantastic. Your offering will have to be amazingly enticing to make many sales from 20 clicks.
My best advice would be do the mahi and get started on personal outreach via LinkedIn with your personal account and no adspend. Try to add value to your target demographics to get them on a call. It will be a lot of work and CEOs are busy, but you will get more than 20 eyes on your content. If you need to advertise then look at a LinkedIn sponsored inmail. Not many people use this option on LinkedIn and it should get you the best bang for your buck.
Good luck with the event! I hope it goes great and that you fill lots of seats.