Pay wise, I would prefer a lump sum subscription like you can get with DDI, with discounts for longer term subscriptions. e.g. $3 a month, or $30 for a year, or $45 for two years, etc... whatever it is but monthly is almost never an option I go for. I bought DDI when it was cheap for as many years as they would let me, and I usually do the same with paper magazines that I really like.
I didn't even realise they'd stopped allowing longer subs. Yeah, that's a deal-breaker for a lot of people. If I can afford it, I always go for the longer, cheaper option.
Was there any reason to drop the other sub options? Seems like a no-brainer to re-instate that.