While dating sites offer plenty of useless info on their users, the elephant in the room is "is she a gold-digger/do I want to dig her gold?" Own up to reality with SeekingArrangement.
In many ways similar to run-of-the-mill dating networks, SeekingArrangement has one huge addition to the typical user profile: Financial Assistance. As such, members fall into one of two categories, Sugar Daddies/Mommies and Sugar Babies -- the sweet, beautiful model/actresses deserving of restitution for their time, attention, and willingness to touch liver-spotted penises. So while other dating sites pair you based on religious, ethnic, or other incidental compatibilities, SA literally crunches potential monthly contributions, i.e., what you can afford to spend on love, and what it'll take for love to tolerate you.
Though the girl/guy ratio is a harem-esque 15-to-1, crossing into Sugar Baby territory yourself'll stack the odds against you -- though your chances of landing that rich, older woman'll go up significantly if you stress that you're comfortable having elephants in the room.