Longman Dictionary Of Common Errors:
WRONG: There are many advantages of having your own computer.
RIGHT: There are many advantages to l in having your own computer.
the advantage(s) of (doing l having) sth:
'He described the advantages of renewing the contract.'
'The advantages of independence soon became clear.'
there are (several l many etc) advantages to | in (doinglhaving) sth:
'There are advantages to working in a supermarket.'
'There are clear advantages to such an approach.'
'Are there any advantages in appointing coordinators?'
Ich verstehe das jetzt so, dass wenn man several oder many einfügen oder ersetzen kann, dass dann "... to ..." verwendet wird.
there are some advantages to using balloons
there are several advantages to using balloons
Danke Hecuba für den Hinweis auf ... after "there are".