Since really anyone could be hacked at this point, I would like to make sure people know several things. I have been hacked before.
First of all, you can get hacked of pets. The hacker could put a pet of yours for trade (since they're on your account) and have a spare or main give an in-store item for the pet. A hacker can use multiple things- trading, Jam-A-Grams, and shops. Be aware of this.
AND, for the future, and hopefully you did this before AJ shut down, try your best to make sure that your animals do not look rare. This will make the hacker want to look through your inventory most likely. Because I wore spikes, a sheep cloak, and nerd glasses, that happened to me, and I lost a total of 2.5 solids worth.
In this case, you cannot counter-login to try and scare away the hacker, all you can do most likely is lock your account. If you have not done this and are a rare jammer, do it.
Be safe! A lot us might get hacked, so be sure to actually avoid giveaways, because scammers may take advantage of the big hack thing.
And,if you were hacked of over a black long collar, people might not believe you. It might just be in my case, but when I got hacked, not many people would donate. One of my buddies, before listening to my proof, blocked me. And also be aware some may be unable to donate, but this does not mean they are bad people, it simply means they might've been scammed, hacked, or bullied recently.
However, if you have buddies that weren't hacked, you can try asking for donations from them. If this doesn't work for you, do lots of adventures like Lucky Clovers, Tiki Trouble, and Forgotten Desert to earn your way back up. If you're not the adventure type, buy as many RIMs as you can. Saving up on gems and diamonds can also be of use to you if you're trying to get back up. Trying to get overtrades is harder, but might work out. You can also try doing art commissions.
In general, try not to panic. There's a chance you weren't even hacked at all, and your account hasn't been touched. There are probably millions of players total, and it's kind of unlikely all of them will be hacked. And, if I don't get hacked, I will likely be hosting extra fashion shows soon. Just to be cautious, I will not giveaway my username. However, if you're sure you were hacked, I will be hosting tons of fashion shows. I'm a little short on prizes, though, so if you see fashion shows, I would go to them. Those are pretty trustworthy, because there's not any trading involved, except for the last part when someone is given a prize (in my case.)