Read it again, "LIMITATION ON AMOUNT OF OWNERSHIP" Not purchasing. OWNERSHIP.
Once GHS owned 10% or more, they would have to file form 4 FOR EVERY CHANGE (SALE to retail or BUY from the company). They'd be filing form 4s on a daily basis.
“No one in this world, so far as I know — and I have searched the records for years, and employed agents to help me — has ever lost money by underestimating the intelligence of the great masses of the plain people" H.L. Mencken