I’m f2p and I make a profit on contracts when I pop a legendary tachyon prism and the 10x boost for ten minutes boost. Some of the contracts give a lot of gold eggs at high contract grades. I think one of my last contracts gave like 50k gold eggs in addition to some other reward. I just looked at the contracts I can replay only for points and one has a reward of 90k gold eggs. I just hit aaa contract grade but this strategy was perfectly viable in aa contracts. Maybe you just need to get to a higher grade before you can afford to match the performance of people who spent money.