Which language learning platform first introduced the 'streak' loyalty concept that rewards users for consecutive days of practice and has since been widely adopted across the industry?

In the competitive landscape of language learning and linguistic tools, companies have developed innovative loyalty programs to retain users. These programs often leverage gamification, achievement systems, and exclusive content to keep language enthusiasts engaged. This poll tests your knowledge about one of the most successful language learning loyalty strategies that revolutionized user retention in the industry.

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Duolingo
Rosetta Stone
Babbel
Memrise