Is pagerank bullshit
 

Well, i think it is

Some sites of me, 3 years old, lots of content, 100% coded ok is getting lower pagerank than some sites made by friend with 492 errors and no content ?

How it's possible ?
You tell me

It sounds like you don't understand what pagerank is all about. It has very little to do with how your site is coded.

I send google quarterly bribes for my PR

Not sure how it directly influences a sites ranking anymore, however, typically the more PR your site has, the more pages googlebot will crawl. The more pages you have indexed, the more chances you have at getting traffic :)

any tips on how much I need to send?

lets all pool our money together...everyone send me $1000, and I will.....forward it on to Google.

I have a site (non-adult) with PR4 . a not so important subpage on it (partners links page) got PR6

I'd say it's bullshit but this bullshit helps me get good backlinks now ;)

It depends how much "Columbian Gold" I include in the package. Those Google programmers live off that stuff.