Ofc they can pull him with free pull. Do not mistake "free pull" with "first pull". They could just as well use 1000 scrolls and the next day get jackpot with free pull.

They never told us exact numbers. All treasure breakpoints are just average number of pulls after which playerbase got their rares. For a long time (for unknown to me reasons) seal draw threasholds were a taboo, same as speaking about any other naruto online version.