The cost for the search is generally far more than money. It takes some time, yes, but it also consumes energy and mental health to absorb repeated rejections and expressions of fear. (I understand the fear, to an extent. Some men are genuinely scary, and can make someone very sour to future encounters) It also constantly judges your self worth as a person. Wise people can turn away the misjudgments of young fools, but often only so many times.

I'd probably consider going back if I could find hard evidence of some level of interest and commitment from anyone on any of those sites. I have never seen it before, and don't expect to. One time I was on a tour in another country, and learned that the women in my group were putting themselves up on dating sites within the area, even though they were being bused around the country on the tour, and had no chance of ever meeting with interested parties. It was purely for the attention-seeking. I've decided my attention is not free, and it's been a powerful move for my mental health - for the better.