but if between them all they announced plans that would, over the next 6 months to a year, commit to buying 5M additional shares

Not even I would commit to that.

If there were regular purchases over the 12 months and after 6 months the price had reached $1 the commitment for the remaining 6 months would be approximately $2,500,000.

Would you commit to such a plan?

I'm quite happy with them purchasing as they are able and within their respective budgets.

Be well