[gs8]

First you should ask yourself why you need a cofounder? What will they do?

If what they will do is perform a job than you don't need a cofounder but an employee.

If you already have a stable service I don't see the point of brining in a cofounder because they wont have your vision.

One thing that could be beneficial is if you have a competitor who is at the same level as you, you could merge with them and become cofounders which would help you increase your presence, provide reasonable equity, and offer similar visions.

If you just need a cofounder to reduce your workload you could always hire programmers to do the development work and manage your business yourself.