The problem with this is that they want to claim the concept of BPS, which is false. The BRR I believe is new. And as I've said before, I highly doubt the discounted stock is available to the general public. In the OP (edited) I think that is implied with the PIPE offering.
BRR is nothing more than the Bitcoin Yield in Strategy jargon. Ideally, it is a little bit more sophisticated, as the BTC Yield is a very approximate return index.
As far as PIPE is concerned, while I am pretty sure the initial offering was made at 10 USD per share, looking at the current price of CEP (30 USD, roughly), even if they accept you in the PIPE (where "you" is a generic accredited investor, most likely someone willing to put north of 50 million on the table), I highly doubt you would be allowed to, but at 10 USD per share, 25 USD more realistically.