Our audience is solely Bitcoiners which makes their motivations somewhat similar, but definitely not the same for everyone.

First, distrust in a government. No matter which country my client is from, he/she really want to distribute risks - limit their dependency on one particular state in case "shit hits the fan" or 6102 on Bitcoin becomes a reality. Basically, an insurance policy to get out in case of an emergency. Hence the "Plan B passport" name.

Second, taxation. Not everyone is willing to give up 40% of their capital gains. The jurisdictions we work with have zero-cap-gains taxes. Love it.

There are few more reasons - maybe they need for a more powerful passport (ex: Russians/Iranians can't travel anywhere due to the weakness of their passport in worldwide geopolitics)

Another reason - actual expatriation. We see a lot of Digital Nomads moving to Latin America for a fun lifestyle and low cost of living. Mexico, Brazil, Costa Rica, El Salvador are becoming more and more popular amongst Bitcoiners.