I was backreading some topics in Marketplace and found out that signature campaign was not included in the first service of this website... What if Signature Campaign was never introduced... What else could be the Service we can apply for?
There are many ways to offer services in any marketplace - use your common sense than making a thread for it. You can offer to provide your skills on any field you are expert or have expertise or experience in. Designing crafting and making new software is also a necessary service and hence many coders and developers are also found to offer their work here. Even if signature campaigns were not there - bounties based on altcoins would be there if the ICOs needed them.