Yo 
Was just wondering, if you were to run an email submit with your coreg on it over just a normal email submit from a network, will it always be more profitable?
Ah cheers dude
Was just wondering is it by a fair bit, say +.10 epc?
Depends what coreg network you use and if you monetize further the data you collect.
For some niches coreg blowed completely the original submit for me.
I think it gives you more flexibility as well.....you can really tweak your lp to the traffic your running with co-reg
Ive done it both ways and I think you should test both cause you never know which will outperform each other. Ive had submits just completely murder my coreg path and vice versa. Not just small differences but huge EPCs differences.
I'm just learning about coreg (should be signed up for GT and have something up today), but it's my understanding that if you're running an email submit campaign that's profitable now for a couple of days/weeks, then it should out perform with a coreg path. Reason being that majority of email submits are coreg paths so if you're still getting paid then it's working out for them, which means it will work out for you as well (in theory).
Am I understanding that correctly?
Yeah , that's the correct reasoning but you can't be 100% sure the path will outperform the email submit.
That's because most email submit advertisers have other ways of monetizing the collected data ( email marketing ) and mobile numbers.
In my experience using a path out performs the original submit 80% or 90% of the times.