@elonmusk charging $8/month for a blue checkmark Or Bringing back free verification, and then offering people the opportunity to follow each verified account for a fee $0.50 to follow / month $0.25 to tweet and reply/month
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So right now you have a potential 3.2m / month revenue based @ 8$ / month To meet this you need about 6.4million users to follow your 400k blue check marks The add the ability to comment back for $0.25 / account followed
Here's the thing emergency services that people need may choose to not verify Ooooh... link it to PayPal! Just say'n