No, a few million hits from bots is routine for anything that's facing the public at all. Others have posted on this thread (or others like it, this article's been making the rounds a lot in the past few days) that even the most basic of sites can get that sort of bot traffic, and that it's just a simple recursion depth limit setting to avoid the "infinite maze" aspect.
As for AI training, the access log says nothing about that. As I said, AI training sets are not made by just dumping giant piles of randomly scraped text on AIs any more. If a trainer scraped one of those "infinite maze" sites the quality of the resulting data would be checked, and if it was generated by anything remotely economical for the site to be running it'd almost certainly be discarded as junk.