DTCC unlock. That might be good, but doubt it without a good reason for buying SFIO. Currently, there isn't, so you would prolly just see selling very quickly down to no bid. jmho
I do not share your opinion about the the protection of brokers, but can't prove it either. It has never been proved to be a big conspiracy....even the famous Overstock.com case couldn't prove it.
If it was my belief, I would not play this game in the pinks, like SFIO. Again, jmho
gl