LeadShare is bundled with the SlideShare's PRO service which has three plans - Silver, Gold & Platinum. The features available with each level are as follows:

The cost per lead for LeadShare is very low compared to other lead generation systems.

• PRO Silver plan costs 19$ per month. This gives you 30 leads for a per lead cost of 63 cents. 
• PRO Gold plan costs 49$ per month. This gives you 70 leads for a per lead cost of 70 cents.
• PRO Platinum plan costs 249$ per month. This gives you unlimited leads.. the per lead cost depends on the leads you collect .. it could be extremely low if you collect a large number of leads.