Best guess: it’s like the innocuous “wrong number” scam or the looking for love email scams. Talk with “her”, form a “friendship” or “romance” until she has your trust enough to sucker you into buying whatever scam bitcoin or sending money.
As a Real Woman™ I would never send a blurry candid to introduce my face. The poor lady who got her picture stolen (maybe this is a video screenshot?) probably has nicer shots of herself. Ironically the spammer trying to seem “authentic” with this picture just makes her feel faker. I imagine most people want to put our best foot forward and make a good impression, hence a nice picture.
My UI could be prettier but it is not distractingly bad or ugly. Just changed my wallpaper and that’s probably the only visual customization I’ll do.