2 200 OGR: 5 USD -> 440 OGR = 1 USD
5 000 OGR: 10 USD -> 500 OGR = 1 USD
11 000 OGR: 20 USD -> 550 OGR = 1 USD
23 000 OGR: 40 USD -> 575 OGR = 1 USD
36 000 OGR: 60 USD -> 600 OGR = 1 USD
50 000 OGR: 80 USD -> 625 OGR = 1 USD
For the range of cost if you were to get the lowest OGR/Dollar to higher OGR/Dollar rate.
1 Week = 800 OGR -> $1.28 Worth of OGR - $2
1 Month = 3500 OR $6.00 -> $5.60 - $8.75
3 Months = 10000 OR $16.99 -> $16 - $25
6 Months = 20000 OR $32.99 -> $32 - $50
1 Year = $59.99 OR 40 000 -> $64 - $100
1 Month Recurring = $6.00
**For a week, it's actually decent since you're essentially paying $2 for a trial, if you like it, you stay, if not then oh well although you may not get the full experience of playing depending on how often you play.
**For 1 month, you save at most $0.40 by subbing with OGR which I honestly don't see why you would pay $80 worth of OGR if you're only going to play for a month.
**The only benefit of subscribing via Ogrines at the best value (50,000 OGR for $80), is that you save a whole $0.99 for 3 or 6 months. Honestly, I can't see many people actually paying $80 if they're only going to subscribe for 3 or 6 months.
**As for a year cost, the OGR/Dollar ratio is pretty bad losing you out on $4 if you decide to purchase with OGR instead of Dollars at the best value.
As you can see, it's actually much better to buy subscription via dollars than Ogrines unless you have some leftover from buying items or intend to buy items and would rather buy OGR in bulk.
tl;dr - Buy subscription with money unless you actually intend to play A LOT because you will have excess OGR if you're only interested in Subscriptions. And the most useful Ogrine restricted items are tradeable (Makabras) so you really have to question ease of access versus saving.