You have to do it a lot less frequently, as the older one gets, the less one spends on friend time.
Also, it will take place in much more pleasant venues, like a nice restaurant instead of a filthy dive bar (but don’t completely forsake the filthy dive bars).
Guys just coming out of academia or at their very first grown-up job may not get this (unless they’ve had a tough life, in which case they’re basically an “older man”).
Younger men will take you to a low quality, over priced restaurant if they want to impress you.
Because such websites attract more men than women, they often offer women incentives such as free registration and discretion.