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?

Can you share where you have read that? Also there was also a thread here that actually points about the futility of the Signature Campaign as sometimes even if we garner a log of signatures or we exceed it even. Some of us or the persons involve dont listen or value it.
Yeah I agree give us some link because your topic was not that informative. But of course it wasn't the main plan of services, escrow is one of the reason why there is services in the marketplace, and other thing to do locally there is not much to do there if signature campaign wasn't included, managers too are part of the service so there are still thing to do or to offer even without signature campaign. They need to do some surveys and such things can be offer.