Getting multiple Minnowshares Sponsorships over time gives an option to get a Free Share (Paid for by the program) from the 
I'm again way over time with this update as Level 20 is about to close down this week. 2 more share conversions were done after level 19 was complete.
The people that earned a free share will get it added to the upvote list immediately the day after a new level is 100% complete instead of at the time that level comes to an end just to avoid confusion.
All sponsorships are inside the Level spreadsheets and posted each time a new level is complete. They do contain all the official information and mistakes here are merely counting errors that can be corrected so please let me know if I made any.