not necessarily. according to Raeki's guide, if you volley 55 times (110 hires) then its a 99% transfer rate. However, the vollied ally's price will rise to 220x the original price if you do this, so plan accordingly
Who says Alts are illegal? You can have one on each iDevice you own AND one on PC/Mac For me that's.... Let's see... 1. iPhone 2G 2. iPhone 3GS 3. iPad 2 4. My PC That's one main account and 3 Alts Yummeh!
Silvaya and SexyWarrior69 are correct on their assumption to transfer cash. You may also setup stripbanks using this method... You ask.... What's a stripbank? A stripbank is an account with lots of cash but the stats show 0/0/0/0 How do you steal from a stripbank? You use a very small alt.. 150/150/0/0 or a spy 0/0/150/150 to attack and steal; but remember StripBanks are always potted with all def and spy def pots.
My number was approximate it of course depends on the amount of times you hire allies while transferring and the amount of times you drop.
A friend told me that target account shud have 27 B and the giving account about 30B. Volley a 119mil player to 29B then giving person drop him. This give the best rate. If u start above 119m or go over 30b u lose too much the gold. good luck.