Sharing of live events enables you to get more periscope followers and may in some instances make you lose a good number of the same. That is why it is important to be selective in whatever broadcast you intend to share with your followers. It is important to stick to posting content that you described on your profile page at all times as it is the first place pulled some fans to follow you. This affects most newbies who get so excited after amassing a certain following that they end up sharing everything they come across. Something may be interesting to you, but it is not a must you share it with your followers. If you keep sharing broadcasts from other scopes you come across with, you just burdening your followers with constant notifications that easily becomes a nuisance.
Make a point of sharing only the content you find to be spectacular. Many will stick around if you are sharing consistent content at all times. To attract many relevant periscope followers, always broadcast more often the content that is aligned to the description at your bio. At all times, be yourself.