WHMCS license as part of their reseller or VPS plans. This is the most common way to get a "free" license. SkyNetHosting.net
: If you have a new license key, click Change License Key , enter your Admin Area username and password, provide the new key, and save. whmcs valid license key free updated
Often bundled for free with many hosting plans and has a lower monthly starting price. WHMCS license as part of their reseller or VPS plans