Well, paradox games go on sale constantly. I've never bothered charging more than $5-6 for one of the early unlocks to a humble. But aren't you the dude from Codex who somehow finds idiots to pay $15 per early unlock like they don't know the Humble Bundle even exists?
Nope, I am just sceptical. I'm not sure, if this month will be worth buing when it's possible to recoup only like $3-4. I think the majority of people, who could be interested in HOI, already have it. Those unlocks are really bad.