You can grant another person a thinker/tinker power or a wide range of skills. While you can only imbue a single thinker/tinker power (or three with negentropy) per person, you can imbue up to seven (or ten with negentropy) skills. Bestowing more skills or a more potent thinker/tinker power strengthens the loyalty the target has for you, with them becoming completely fanatical to you at the highest level. Note that while this is the case, they can still function and are able to think for themselves, as long as what they are thinking about isn't related to you.
The duration of your boosts, however, is inversely proportional to their strength — the more potent the thinker/tinker power or the more skills granted, the shorter its duration, lasting up to a year at most and a week at least.