There's a few ways to handle it when you go into a stall and NOTHING is making money. When you're a low level and stall you need to avoid black market because you REALLY need the money to upgrade and open up new markets. Always black market attacking is a good rule of thumb, but you really need to know when $3k is worth more than 90 seconds of your opponent's time. Aside from that you kind of have to grin and bare it.
Beyond level 1 and 2 you some better options. When onworld prices are low cash becomes deflated. You can effectively buy more resources with a give amount of cash which means cash is effectively more valuable. This makes pleasure domes stronger when prices are low across the board and there's nothing else to move into. It's a bit of an investment, but it definitely helps when you have nowhere else to turn.
After level 4 you have options. A lot of people make the mistake of always reaching level 5 before making offworlds. This is a straight up mistake when onworld prices are low across the board. What good is 5 or 6 claims when every building you can make with those claims is unprofitable? Before you reach level 5 you should always ask "Is there any money to be made with those extra 5 claims that I'm not making already?". If the answer is no, then go straight to offworlds. While your opponent upgrades and stalls you'll be making bank off the low resource price, and driving up the value of your own resources with the increased demand.
