Yes, you will be charged credits regardless of whether the company has the technology or not. The credit cost is based on the number of companies returned multiplied by the number of technologies in your search. For example, searching for 100 companies that use Pardot costs 800 credits (8 credits per company for searching one technology), regardless of whether those companies actually use Pardot or not.
Source:HG Insights integration overview | Documentation | Clay University
Yes, you will be charged credits when enriching companies with HG Insights, regardless of whether data is available for those companies or not. The credit cost is based on the number of companies you're enriching multiplied by the number of technologies in your search.However, it's worth noting that prospecting itself (like finding companies) is free - you only pay credits for the actual data enrichment attempts.
Sources:Credits Calculator | Clay.comHG Insights integration overview | Documentation | Clay University