The Pros and Cons Of A Paid Or Free Membership Site Model
Basically with the free site you will attract more members and have no recurring income, but you can make money as you cross-sell to them. The paid membership will yield fewer members than the free one but you will have a recurring income through membership fees. The paid site will have a higher drop out rate than the free one and the paid site is more difficult to upsell to because they have already paid for content.
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