This seems a non-issue to me. All those on the introduceyourself feed have at least 15 SP if an account issued by Steemit, Inc.. Any invites sent out by me from steeminvite.com are given a 25 SP delegation to give them a bit more juice; yet 15 SPs is enough to get started.
The week of HF20's release was a period which made a 15SP account inoperable, but that seems behind us now from my observations.
25SP allows you to write 27 comments (posts included, but they cost a little more).
If you want to post daily and be an active member of the community, that's just not enough...
Point well taken! Will follow with interest.