Despite the Sticker issues reported in the petition, Monopoly GO regularly holds Sticker Boom events in which players have a chance of getting the missing pieces of their albums. Because this largely boils down to luck and logging in at the right time, some gamers still lack the Stickers they need. As the petition has reached nearly 500 signatures in two days, this issue could affect more players than Scopely may realize. A new currency could circumvent any potential back-end problems regarding the Stars, as a new currency could specifically target Stickers missing in a player's album.
While this petition may shine a light on the Sticker issue, Scopely also maintains a Discord channel for the game and regularly responds to its users. As Scopely continues to update Monopoly GO, the developers may implement a change in the future that makes unlocking specific Stickers easier.