How are Venture Rewards applied?

[Anonymous]

How does Venture apply purchase eraser rewards? If my statement balance is $1000 on 8/1 and I plan to pay that $1000 by 9/1 to avoid interest charges. Then I redeem miles to erase a $300 purchase made prior to 8/1. I then charge another $300. My balance is now $1000. My question is, did that $300 reward pay down my $1000 subject to interest or did it pay down my $300 in new purchases? Do I now have to pay $700 by 9/1 to avoid interest charge or $1000? I can call Cap One but I like this forum.

[HeavenOhio]

[Deleted. I reread the initial question; someone else can come up with a better answer than I did. ]

[Anonymous]

NVM....I found my answer.  I chatted with Cap1 online.  Here is the answer:

My statement balance must be paid in full before the due date...regardless of any rewards.  I asked if my statement balance is $1000 and I redeem $1000 in rewards with no new purchases, do I still owe $1000 to avoid interest charges and I was told YES.  The rewards redemption will then go against the next statement.  

I then asked what if I made no more purchases and I had a credit of $1000?  I was told they can issue a check....of course or apply towards future purchases.  End result, the statement balance must be paid in full, the reward credits cannot be used as any payment on the statement.  I saw that on my redeem confirmation, but I thought that had to do with minimum payment or something.