This is just an advice. Like some mobile games, I think this website can provide some ads for learners to watch, so learners will watch ads voluntarily to earn their LingQ quota. It’s win-win, doesn’t it?
We don’t have that in plans at the moment I am afraid, but if you need more LingQs, you can take advantage of our referral program with which you can earn 100 free LingQs per friend you invite (up to 20 friends). They also get 100 free LingQs when signing up through you!
More details here: Login - LingQ
Thank you! Besides this, how about setting missions and give the learners some benefit when they complete the missions?