I will give you 3 answers to the question "Is there any benefit"
Some stickers indicate membership in an orgination and are needed for access to functions of that group. IE: FMCA egg, no egg, no admission to the rally.
Some may support a cause you like.
Some.. (I have an ARRL sticker I need to stick somewhere) Well, there is a story about a stolen car, the thieves repainted it and otherwise disquised it but they left the ARRL sticker, Since it is illegal to display a feternal emblum (ARRL) less you are a member, the car was stopped and investigated.. Owner got a free paint job out of it.
Some folks, Will use a decal to cover a boo-boo
But with MOST of those stickers they send you.
The major benefit is to the folks who sent it, Free (or nearly free0 advertising for them.
Recommendation: Stuff them in an envelope and only display the ones you want.