If you’ve gambled or spent all your money, and now can’t afford the consumables you need to beat tough forums, you’ll have to go back and pwn some lower-level threads again.
There will always be threads you can pwn without consumables. You should use up all your remaining forum visits beating as many threads as you can, then log in the following day. You will receive deliveries of junk in proportion to how many threads you pwned the day before.
That junk can then be sold at the Ppwn Shoppe for more Flezz, which you can use to purchase items.