A: Hello.
Yes, for one code you can get unlimited widgets and domains (Multisite plan https://anychat.one/pricing).
This plan allows you to create unlimited widgets and install them on any count of domains. But the only person who is able to log in to your anychat dashboard is you.

You need an agency option if you need to install widgets on clients' websites. In the agency, you can create sub-accounts (with Pro plan). So your client can login in their own account.
Basic agency allow you to create up to 5 client accounts. Each additional client account cost $3 lifetime.
Also, we have unlimited agency. With unlimited agency, you can create an unlimited number of client accounts.
Basic agency cost one additional code. So in total, you need 2 codes - the first one activated the Multisite plan and the second one you need to activate the agency.
Unlimited agency cost 5 additional codes (6 in total).