Does "HikaShop group plugin" add or change user groups?

-- HikaShop version -- : 4.4.3
-- Joomla version -- : 3.9.28
-- PHP version -- : 7.4.23
-- Browser(s) name and version -- : Google Chrome Version 93.0.4577.82 (Offizieller Build) (64-Bit)

Hello,

we want to implement multiple subscriptions via purchasable user groups (products with user-group-after plugin feature).

If someone (user group Registered) "buys" into user group A (sub-group of registered), he will be in usergroup "Registered" and "A".

If he then continued to "buy" into user group B (also subgroup of registered), will he lose usergroup A? Will he be "Registered", "A" and "B" then, or does he change to "Registered" and "B"?

If he changes, is it possible to make B a sub-usergroup of A to keep the access to A content?

Thanks in advance,
Jennifer Bezkorov
creationell - die Werbeagentur

Dear Nicolas,

thank you for the quick and useful reply!
We currently don't need automatic expiration, but it's good to know, in case that changes.

Best regards,
Jennifer Bezkorov
creationell - die Werbeagentur