On May 18, California AB 421 was amended to make it less restrictive. The original bill outlawed paying initiative circulators on a per-signature basis. It also required that 10% of the needed signatures be collected by volunteers. The amended bill says that initiative circulators may be paid on a per-signature basis, if the group sponsoring the initiative agrees to collect at least 5% of the needed signatures by volunteers.
So far the bill has passed the Assembly Elections Committee, but otherwise has not advanced.