A little bit off topic and a bit pessimistic, but I have just started a new company and I am surprised how high the rates are for services related to job postings/cofounders. Linkedin, angellist etc. If you don't watch out you can easily spend 50k on zero result. Unfortunately not all startups are backed by 5m. Wonder how much this service costs.
I've never had this issue before but why not either
1) act as recruiter yourself. Yeah, some activist investors will tell you to only focus on core business stuff/creating product market fit but that's just certain people's opinion. Presumably you have some kind of network you can leverage + you can cold message people earnestly
2) Contract with a recruiting agency to perform some of the administrative/vetting part and give you the candidate for 1-2 interviews. You only pay for each hire. Expensive (I've heard of rates in the 10-30k range) but definitely does not cost $50k for zero result. This has the added benefit of allowing you to bundle recruiting tasks that you yourself probably don't have time for like background checks