Whether you should do to zip or not really depends on where you are now, what you are doing there, and why you think the grass in greener on the other side.
If your business is not growning, it likely has very little bearing on the brokerage you are with or the one to which you are goind.
The ONLY reason you should change brokerages is to retain MORE of your ever increasing revenue.
Read that carefully.
In a nutshell, if you are not successful where you are, you wont' be where you are going. If you are expereinceing success...and you want MORE...now you've got something legitimate to pursue.
Descrive the 'green grass' you see in the zip pasture that suggests your will thrive and prosper?
Be aware, EVERYONE is atempting to sell real estate agents pipe dreams, from Adword to Zillow, and CB to Zip. And agents keep buying.