You don't have to do all the TapJoy at once. As soon as you add up to 7,000 gems of TapJoy you will gain Supporter status automatically.
Super Supporter is the next level and is everyone who spent over 25 USD in the Growtopia in-game store or the equivalent in free TapJoy offers. You will receive access to the /warp command and some extra skin colors for your ongoing support of the game. Super Supporter have their name and flag increased in size which you can also disable by typing /hidestatus.
Every time you watch an advertisement and get some gems, the game will tell you how many more gems are required to reach the Supporter or Super Supporter status. Also, you can combine purchases and TapJoy offers to reach the total amount, it does not have to be one or the other.
Please note that the Supporter and Super Supporter status is tied to one account, the status cannot be transferred to other accounts.
Do not hesitate to let us know if you have any other questions!