The booklet published by Senex clearly says they can scale back...

The booklet published by Senex clearly says they can scale back if the issue is oversubscribed and if they have to do that then they would surely have to treat eligible shareholders equally. The easy way to get $15,000 worth of additional shares was to buy $15,000 worth when the announcement was made and the shares were trading in the 30 to 32 cents range because that avoids any uncertainty as to how many shares you may be allocated under the SPP. Thanks to the internet, refunding some of the $15,000 is easy.