- You support the project
- Lot of inLEO advantages like editing threads or making them longer and formatting options
- Getting massive increase on your voting rewards due to a better exposure on your threads and voting preference by other premiums
- Better commitment from the user (premium) since it will be ager to participate and attract more users to get involved
- Feeling like you are part of the project
- Unknown advantages that may come in the future
Hope those are nice reasons to you ;)