You can turn the $70 into much more, but not reselling it on fiver. The idea is simply to buy quality services at a low price and sell higher. You could use fiver to upsell bigger services perhaps, but not to resell services.
Since my last visit here, I've been pushing offline sales too. Not the typical dentists and bricklayer type biz though. Learnt quite a lot of interesting sales channels too- happy to share, let me know.