Treat people the way you would like to be treated and share the work evenly with no favourites
They have an eagerness to get you into the interview and then you hear nothing.
You can chase them up as much as younwant using calls or email but nothing.
Assume if you hear back you have the role but if you are unsuccessful then you hear nothing and are blanked.
Such an unprofessional approach it is ridiculous.
Avoid if you can
Truly do not think it matters, go with what you are comfortable in. It is more a situation if your face fits than you approach to works procedures and ethics.