▁running . ▁These ▁not ices ▁are ▁designed ▁to ▁anno y ▁the ▁user ▁into ▁pay ing . ▁ ▁Fre em ium ▁▁ ▁Fre em ium ▁works ▁by ▁offering ▁a ▁product ▁or ▁service ▁free ▁of ▁charge ▁( typ ically ▁digital ▁offer ings ▁such ▁as ▁software , ▁content , ▁games , ▁web ▁services ▁or ▁other ) ▁while ▁charg ing ▁a ▁prem ium ▁for ▁advanced ▁features , ▁functionality , ▁or ▁related ▁products ▁and ▁services . ▁For ▁example , ▁a ▁fully ▁functional ▁feature - limited ▁version ▁may ▁be ▁given ▁away ▁for ▁free , ▁with ▁advanced ▁features ▁disabled ▁until ▁a ▁license ▁fee ▁is ▁paid . ▁The ▁word ▁" fre em ium " ▁is ▁a ▁port man te au ▁combining ▁the ▁two ▁aspects ▁of ▁the ▁business ▁model : ▁" free " ▁and ▁" pre m ium ". ▁It ▁has ▁become ▁a ▁popular ▁model ▁especially ▁in ▁the ▁ant iv irus ▁industry . ▁ ▁Post card ware ▁▁ ▁Post card ware , ▁also ▁called ▁just ▁card ware , ▁is ▁a ▁style ▁of ▁software ▁distribution ▁similar ▁to ▁share ware , ▁distributed ▁by ▁the ▁author ▁on ▁the ▁condition ▁that ▁users ▁send ▁the ▁author ▁a ▁post card . ▁A ▁variation ▁of ▁card ware , ▁Email ware , ▁uses ▁the ▁same ▁approach ▁but ▁requires ▁the ▁user ▁to ▁send ▁the ▁author ▁an ▁email . ▁Post card ware , ▁like ▁other ▁novel ty ▁software ▁distribution ▁terms , ▁is ▁often ▁not ▁strictly ▁enfor ced . ▁Card ware ▁is ▁similar ▁to ▁be er ware . ▁ ▁The ▁concept ▁was ▁first ▁used ▁by ▁A aron ▁G iles , ▁author ▁of ▁J