This thread is a long one, but what I want to add to this is people will contact those they feel attracted to. Attraction is complex biological and emotional and even spiritual response. Men are visual, and attracted in general to a particular look or range of looks (whatever that is for them) and unfortunately the traits most are drawn to tend to "skew" younger.
I dare say that for most women who are over a certain age, like me, the reason you are not being contacted is not just our age; it's something else: they are not attracted to you for some reason. Harsh, but there it is.
Sure an older woman (let's say over 50) can be in shape, cute, healthy, sporty, and as active as a 35 y.o. But to be honest, most are not. There it is.
It's not fair, there are all kinds of reasons for it, and everyone should be forgiving and generous and charitable and should be grown up enough to overlook whatever the issue is, but it's still the fact. Harsh, but true.
And the fact is that most men are not drawn/attracted (for whatever reason) to old looking, old in attitude, old in body, old in ability to bring forth children, old in health, old in activity level, old in interests women. I wish it were otherwise, but there it is.
Many men see themselves as perpetually 30 years of age--and if they are still "30 in their heads" they certainly are not going to date a 55 y.o. woman, and certainly not one who actually looks 55, seems 55, and acts 55 (to use my soon to be age).
Further, some people are searching with a set number in mind: like age 35 to 49, and they are not going to change that, no matter how old they get. Or seeking 15 years younger than they are, and I say good luck with that!
But I don't think any number of posts about the situation will change it. This is hard wired, basically biological, and you are not going to "convince" a man to be attracted to something he does not find attractive.
You either have to change yourself (to better "match" what your own demographic seems to looking for, even if you can't change the number on the driver's license), or, you just have to wait for the one sensible, mature and loving man who just might be able to see the whole of who you are, age number and all, and wonder how he ever lived with it!
I would argue that feeling that the older men who are contacting us (who are at least attracted to US, despite the age number) are older guys looking for a "young chick" (young compared to them) is the same issue in reverse: we are not attracted to older men because we are just NOT attracted to them (not just because of a number, but because they look like our grandpa, they are sickly, going to die soon, we don't want to be a nursemaid, we are not retired, or whatever the reason).
So really, we are doing the very same thing: we are not attracted, we have our reasons, and while it looks like it is about age alone, it actually about the complex thing called attraction, or lack thereof.
I myself think that everyone should be open to someone their own age. If you are not, I think you have some serious self examination to do. IMHO.