Heres a little guide to help you gain some riches!! Whee! Here's a list of what you can do to gain ZP:

Games:
This is the easiest and most common way to gain ZP. The most popular game is the Random ZP, in which the game will give you a random number of zetapoints that range up to 2,000zp! This can be played once every two hours. You can gain ZP in all of the games on Zeta, so keep playing them!
TIP: On Cloudbuster, try to survive until at least the 2nd level. If you do, when you submit your score, you will win 1,000zp! Plus, you can submit your score 3 times day!

Also don't forget Zeta has its own mystical oasis where you get a free random item once every day!

Selling:
Selling items is a very good way to earn zetapoints, fast. You can sell items that you obtained in random events or that you just don't want anymore in your shop to make profit, or sell a rare/retired item to users in the Trades forum. Think a bit before selling rare items, encase you change your mind it will probably be very hard to get the item back again!
TIP: How to send zp to someone in an auction: Many people ask this question, so we will provide the answer! If you are selling the item, (say for 300k), first stock some items in your shop that are common (such as a cheap toy or food), and price them so that they add up the amount that you are selling your item for (in this case, it's 300k, so say, price 3 cheap items in your shop for 100k each.) Now all you need to do is wait for the person you are doing buisness with to buy those items, send them a z-pal request and send them the item you're selling. Now run to that shop till and bask in the riches! XD

Donations:
Occasionally, some very kind users donate ZP and items in the Donations center, which can be found in Zetapolis. You can pick donations up, but you can only pick a donation once every 2 minutes!!

Trades:
You can also trade Rare and seasonal items in the trade forum for either Zeta points or allow other users to bid in Items of your interest. Or simply trade it for an item you want. To hold an auction you create a thread which must include the following information:

Start bid

End Date

And If you want you can place an auto buy option in the thread so whoever offers the auto buy automatically gets to trade with you for that item.

Enjoy trading, selling and earning millions on Zeta :)