How To Upgrade Your Membership
From Only $4.04 Per Month
$97 / 24 months =  $4.04 per month
As you might see, the longer the cheaper.

Step 1:
Scroll down to the prices and click on the blue link on the price.
Like the picture shows:
Prices
Then select the one you now want. 
This is not an automated subscription which means You have full control
Make sure you have the right membership selected.
Step 2:
Make sure you have the right Gateway selected.
Make sure right gateway
Step 3: 
Click The Buy Button it looks like this
For more help see also 

Memberships

Default Basic Membership Starter Silver
Photos 1 3 10
Videos 0 1 Unlimited
Friends 5 50 Unlimited
Top Friends 3 25 Unlimited
Same gender interaction No Yes Yes
Messages 0 25 Unlimited
Free message replies 1 25 Unlimited
Interactions 1 25 Unlimited
Shoutbox access Read access Full access Full access
Groups create 0 1 Unlimited
Groups join 2 5 Unlimited
View other profiles Yes Yes Yes
View profile photos Yes Yes Yes
View received messages Yes Yes Yes
View photo comments No Yes Yes
View video comments No Yes Yes
View profile comments No Yes Yes

Prices

Default Basic Membership Starter Silver
1 month USD 47.00
12 months USD 165.00 USD 175.00
24 months USD 195.00