If there are many sponsors, this would also be rated and deemed to be a sign of having wide connections.
Personal connections are the sole weapon of a noble.
“Although it is unusual, we’ve got to host a party for you. You are a dragon-slaying hero after all, boy.” (Burkhart)
In other words, there will be many nobles and merchants who will intrude uninvited to pass on their presents.(ED; Even the party crashers are giving him gifts? Score!)