FediTips has moved!The posts from your old account don't disappear, they remain on the previous server and people who click on the name of the post's author will be redirected to your new account.
Also bear in mind that no server on any service will keep your posts forever:
The only way to keep posts online indefinitely is to own your own service (which is what I encourage at https://growyourown.services).
All GNU social JP content and data are available under the