Why were there more Vine shares than Instagram shares on Twitter last week?

Marketing Land:

On Friday there were more Vines shared on Twitter than Instagram photos. According to Topsy Analytics… there were about 2.37 million links to vine.co shared on Twitter over a 24-hour period as of about 11:30 pm PT Friday night. That’s well ahead of the 2.14 million links to instagram.com that Topsy counted in the same 24 hours.

What changed? I suspect the increased user base through the release of Vine on Android on the Monday before these numbers has a lot to do with it. Let’s see how many of those new users are retained in the next few weeks. If Vine is going to go anywhere, it needs to retain the curious.