Make the header provide as much critical information as possible so that I know immediately whether to open it or trash it. Most important in the header is in this order, Price, Shop Dates, Name of Business to be shopped. Most of the time, the header is all I have time to read.
If the overused and misused words "fun" or "easy" are in the header, I ignore them. If the shop were fun or easy and paid a decent amount, it would already have been taken off the job board by another shopper. My pet peeve is the email that has a ton of text in its body and a link to their job board but no mention of who the client is or what business is to be shopped.
And while we're on that subject, MF needs to put the name of the business on their jobs available page; not just the address. You should allow us to use our time shopping for you instead of making us waste that shopping time by looking up every address on Google to see what store is to be shopped. Often there are multiple stores at the same address, and I can only make an educated guess which store you want shopped. I should not have to open another slow-loading page to find out each shop is and then reopen the jobs available page and repeat the process over and over. This wasted time could be better used shopping your shops.