Since adding new words is the check Skritter puts for making users pay for it and that now there is and IOs app one of the payment options could be InApp purchse on the basis of words/characters one add.
5$ 100 words/characters
10$ 300 words/characters
and so on.
This will be useful for advanced users who have added quite a few words in their accounts and tend to add few words after say two year of Skritter usage.
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