An invitation from a not-so-famous journal called "world biomedical frontiers" to feature my paper on their website
No; this isn't how reputable venues approach authors. This will have at best zero value (possibly negative value if someone notices, which is unlikely given how little visibility they apparently have), and will cost you $38. 

(Its funny that they advertise that they get 8000 website hits per month. This strikes me as an exceedingly low count, given that they probably get a hit from many people they send this spam email to)