is there an extended addons per extended xerochat for many users?
For add-ons we allow regular license for all. So add-on will work for all Extended license & regular license of XeroChat.
Regular license can be used by you or one client, in a single end product which end users are not charged for. If this product is an add-on of another product, then you can buy extended license of parent product only and purchase regular license of the this product.
this is mean that 2 persons only will use this features!
No, Add-ons can be used by your all users & can be charged.
That extended rules for parent product.
As already said, for add-ons you don't need to buy extended.