So, the results of my test

[wellwisher]

To start, the way it's been formatted.
The amount of days since the previous trade, the value of the items traded over, the amount of platinum traded over, and finally the amount of items traded over (this includes game items and aquarium items)
355 days. 93,250. 1,488,041 platinum. 506
355 days. 262,755. 1,471,077 platinum. 931
355 days. 347,367. 1,445,853 platinum. 927
355 days. 646,475. 1,440,974 platinum. 992
355 days. 388,021. 1,483,331 platinum. 1005
355 days. 464,427. 1,487,757 platinum. 988
355 days. 655,971. 1,476,306 platinum. 949
355 days. 378,122. 1,477,248 platinum. 1008
355 days. 505,546. 1,471,328 platinum. 981
355 days. 308,566. 1,496,744 platinum. 988
355 days, 334,504. 1,483,864 platinum. 1030
356 days. 541,532. 1,491,954 platinum. 1008
356 days. 570,509. 1,488,916 platinum. 999
356 days. 573,233. 1,490,605 platinum. 971
356 days. 460,072. 1,483,232 platinum. 995
356 days. 351,168. 1,495,598 platinum. 997
356 days. 421,055. 1,474,420 platinum. 999

What does this all mean? Well, for a start, you can make a fair amount of platinum without doing a whole lot. I posted once with each account, did a journal entry with each account, did daily chance, the daily log-in, and if there was an announcement that had those little bead bits to indicate that there were prizes. (important to mention that they often granted like, 1-5 platinum, and 1-5 gaia cash) It's not a massive amount of platinum, but if you aren't in any rush to earn platinum, just doing those things (they take about 2 minutes per account per day) you're going to do quite well.
I would say that about 300 of those items (barring the first account) were what I consider junk items. that is, items that are the cheap things and house items that aren't really any good.

I traded over 16,274 items (including game items) valued at 7,302,573 platinum. well, via the gaia inventory value option. I also traded over 25,147248 platinum.  

[the Lonely Pheonix]

And if anyone is interested, my storage account now has an inventory worth of roughly 53,612,825 platinum coming from 86,051 items. and has 41,336,666 platinum. It's been an interesting experiment.  

[wellwisher]

It also averages to about 1208 platinum in items per day, and 4162 platinum per day.
So it really does pay to do that 1 post and 1 journal entry per day. (for the platinum) More so than doing daily chance each day. having so many accounts allows me to collect a lot of data very quickly.  

[Anaya the Bee]

xp I wanna steal your items. Lolz just kidding. I don’t find the worth of items anymore.