Yes Iss offer much better pay at a hourly wage. You are right about CW, sometimes the pay is very little and there is hardly anything to do on there.I wouldn't asume that there would be a problem combining CW with ISS/Team.
They both use UHRS, but isn't team offering an hourly wage? CW certainly doesn't. Plus you can always jump back onto CW once you've signed up with them.
I would still have to ask first I think, I wouldn't want to be kicked out of UHRS altogether.