I'm going to guess that Bumble is aware of that, and that males who reject too many times will be dropped.
Still, I think that guys will generally respond positively to any female attention. Even with a woman of below-average attractiveness, an attractive guy may decide she's worth keeping around as a reserve possibility, in case his more attractive date fails to show. Or he may decide to try her out, thinking that a less-attractive woman may try harder to keep him happy.
I wonder if they have the equivalent of the girl getting rejected and a group of his men gather together to giggle at how silly she was to think she had a shot with HIM!
he will be wrong assuming what you said
she wont try harder