as far as whatsapp goes.
Unless some magic unicorn has come along...
Whatsapp has effectively closed it's doors to hacking it for the n900.
Telegram works with pidgin ...that is about as good as it gets.

Being in IT helps I am sure...
But Linux and especially maemo are a different breed of cow than windows or mac or android...
what applies to them....what fundamentals they follow ...
does not apply to us.

as far as removing the obsolete links goes....
that is up to the site maintainer-ship here.
there most obviously must be issues with its removal...or it would have been done so day 1

"Hope I can trust this link and it is working."
?
they are the official files.
they were moved to the internet archive on purpose.
they work.
everyone else here uses them and has trusted them for years.
what would be the point of referring you to a bunch of necessary files to deceive you?

Rather ...you should be wondering if you can trust a vulnerable http as the link to your obsolete and outdated yappari page you linked ...
I would suggest reading through talk maemo here on whatsapp and yappari....since this place IS where all the conversation goes on...concerning what works and what doesn't...
and you will find yappari hasn't worked in about a year now...