I normally don't monitor this very carefully, but I noticed I had a couple subs sales that I got $.30 for. I thought the minimum was $.35. Has this happened to anybody else?

No...but I did have a 3 credit sale for 45 cents, or 15 cents per credit.

I think the partner's share of sales is deducted from your commission.  I've had several at 32 cents.  Not familiar with 30 cent sales.
But ... DT always has an explanation.   

Stop worrying, it's a sinking ship for everyone but big timers (according to this week's reports). So business as usual

I think the partner's share of sales is deducted from your commission.  I've had several at 32 cents.  Not familiar with 30 cent sales.
But ... DT always has an explanation.   

That seems like a logical explanation. I guess I'll have to ask them to see what they say.

DT - and IS, and others as well - keep ratcheting down the subscription comissions, hiding behind increasingly convoluted cr@p like "old credits".  The reality is that in the subscription model there's no direct relationship between what a buyer pays and what the contributor gets.   The payment to the contributor isn't even a "commission", it's basically a token.  They've slipped in so many exceptions and layers of indirection in subscription pricing that it's not possible to know if your payment for a particulare download is even correct.   It could be 3 cents, and if you asked DT about it, they'd have some crazy explanation, and you'd have no way to contest it. 

Frogs being boiled slowly, etc.