Base GA Connector price includes one domain and unlimited subdomains of this domain.
Each additional domain costs +$20/month. This includes unlimited subdomains for each purchased domain.
All additional domains and subdomains have to be connected to one CRM account. Otherwise, you need to purchase a new license per each CRM account.
P.S. This only applies to GA-to-CRM integrations. CRM-to-GA integrations (if purchased separately) include an unlimited number of domains and subdomains.