if the CR is not oversubscribed, then for every right you own...

if the CR is not oversubscribed, then for every right you own (i.e your existing entitlement, or additional ones you purchase), you can apply to purchase shares at 0.01, note that rights trading ends tomorrow (22nd of September).
Also, note that MGTRD will likely trade at 0.003 upon open, so if you add this to the share price you get 0.013, which is the current estimated market open price for MGT FPO (and there are more sellers than buyers by the looks of things).
So what makes you want to purchase MGTRD, rather than buy on market?
You are of course free to do as you choose, all IMO, DYOR, not financial advice.

For every two shares you purchase and then receive (upon settlement) under the CR, you will get one OPTION, exercisable at 0.05 on or before the 29th of September. This is not a share until you exercise it, it is an option.