I know nothing about advertising, but does it really matter if you are getting bot traffic if you are still getting conversions from the ads? If you know that for every $10 you spend on LinkedIn ads, you get 1 person to sign up for your service, then it doesn't matter how many mistaken clicks or bots clicked on the ad since click through isn't the main metric you are using. Isn't that why websites have so much tracking? So they can attribute an ad to a conversion rather than just looking at the number of clicks?