Hey Kate! Sorry for the delay. It looks like the accounts do pay interest:
"When you Save to Win, you not only get a chance at winning $5,000, but you walk away with the deposits you made over the year – plus interest. A definite win-win situation!" - (http://www.savetowin.org/product-info/how-save-to-win-works)
Thanks, Jaskeerat! Those statistics are very enlightening. Most of the nursing home residents I work with in my Bold Folks Home project don't have an opportunity to gamble, at least that I'm aware of. My inspiration comes from relatives who routinely purchase tickets with hopes of hitting it big. I also saw a lot of seniors at the only casino I've visited, which was in Pittsburgh, Pennsylvania. I think that gambling is a simple form of "investment" that has incredibly low barriers to entry, which makes it appeal to people who may have procrastinated on actual retirement planning.