It's not really the addition of RAM that is the problem. For example BPs will know when their fellow BP and BP candidates will release a dAPP before ordinary token holders do. In order to fund a dAPP a developer may buy RAM in small amounts over a period of time - over what they need to release the dAPP. They then announce the dAPP which will in theory produce a spike in the price and the developer sells their surpluss RAM.
OFC I could be misreading how RAM and RAM trading works :D
"I do hope my posts helped the market :-)"
It is quite a coincidence :D