As you say, there are plenty of claimed accounts already created, and being created daily. Turning them into created accounts merely requires a username and keys. However, that new account has zero SP so cannot do anything. The key here is to find those able and willing to delegate a minimum SP.

However, I was mulling this over and thought about how to do this in a way that is both helpful to the new user and to the whole onboarding process.

The existing platforms that take some beneficiary reward (BR) from their users could do this in a way that scales up. Let's assume a minimum of 20 SP delegated and that a platform takes 5% BR. A new user band can be created that has, for example, 7% BR; that 7% BR goes towards paying back the 20 SP. Once the 20 SP is paid back, the user has the option of requesting the delegated 20 SP to be undelegated. This only makes sense to them if they have already powered up more than this, so this also encourages to vest their earnings. Making it a request, rather than something that just disappears suddenly, places the responsibility on the user. Once the SP has been undelegated, the user gets the benefit of having just 5% BR.

At the end of this process, the platform has 40 SP and can onboard 2 new users, and so on.

Those new users who never make it to repay the 20 SP can keep it for a fixed number of months after which it is removed, or whatever arrangement the platform chooses. Some method is needed for those new users who make no effort to pay back the delegation.

Comments?