Which pricing strategy was most notably employed in the 2008 Obama presidential campaign's fundraising approach?

Campaign financing is a crucial aspect of political strategy. Modern presidential campaigns require massive budgets for advertising, staff, travel, and more. The pricing strategies behind these campaigns reflect both the evolution of political marketing and the increasing costs of reaching voters across multiple platforms. Test your knowledge about the financial aspects of running for the highest office in the United States!

This is a live public trivia poll on AIPolls.Net. Vote and see real-time results.

Micro-donation model (small recurring donations from a massive donor base)
Premium pricing (exclusively targeting high-net-worth individuals)
Penetration pricing (initially low donation requirements to build donor lists)
Bundling strategy (combining donation with merchandise purchases only)