It’s more of a blanket thing. If there are 10k alphas, and they average 1 dollar a month, that’s 10k a month they’re bringing in for CCP.
10 alpha Injectors (which each provide 50k sp) cost 200 plex in the store, or 25 plex if bought as a single.
Using the base PLEX price, that’s 20 injectors for $25 if bought as singles, which makes each injector an Alpha uses cost 1.25. This is however, the most expensive rate.
Using the same basic plex package, but purchasing them 10 at a time, will cost $1 per injector.
The prices drop a lot if a person buys PLEX in bulk, but for argument’s sake, we’ll say each injector is at least 50 cents, so 2 for a dollar.
On the market, an injector can be purchased for about 50 million isk. So, for less than an hour of doing pve (maybe even 10 - 15 min if they’ve got something good going on,) an Alpha can easily buy a daily injector and use it. That’s at least $15 a month (30 - 37.5 if bought with the more expensive methods.)
Obviously not all alphas are going to grind this way, but a few will, and they’ll bring the average up for the rest.
It’s a similar thing with skins. There are a lot of skins that are 10 - 50 million on the market. And some premium skins are over a billion. And even if the skin isn’t available on the market, the Alpha can always buy PLEX at 5 million per and save up for a skin they really want. The Angel Hex skins are a particular favorite of mine.
So yeah, I think people drastically underestimate how much CCP makes off of Alphas. I don’t think it’s as much as they make from Omegas (or they’d just ditch the sub all together) but it’s still significant.