Botters dont typically sell mats, they “mine them for free” as there is no opportunity cost involved in botting (cos you arent playing, the bot is). They then process them further and sell finished products, as their margins are much higher/wider then via added value.
DED/faction drops and items have taken a nosedive over the last years (offset now somewhat by module sink through mutations), due to botting.
They do however use bot gained isk to buy things, thus artificially increasing demand, raising prices.
Imo this is especially true regarding the PLEX market.
A bot that rats 1bil isk a day, will generate 365bil illegal isk in a year, enough for 243 subs via PLEX, at current ~1.5bil per PLEX sub.
Think about that for a moment…
Two hundred forty three PLEX subs, in a year.
Thats an enormous strain on PLEX market, from ONE SINGLE BOT, let alone thousands of them over years.
PS: Botters do NOT buy sub, nor PLEX, nor extractors, nor MCT, or anything else from CCP. They buy them in-game with illegally sourced isk, and revenue sale proceeds from illegally sourced mats which they process into finished products.
The harm and criminality of botting, especially as connected to RMT (which botting supplies) and account hijacking (which supplies bot accounts), cannot be understated.
Its fking EVE up, day after day, year after year.