Oh, I was reading it as written and not making any interpretation, since that's pretty much exactly what's written.
There is nothing about losing them, having a limit on the number or how long you have them, or restriction on when you can spend them other than the actions associated with it (can't spend a standard to cast a spell when it isn't your turn). However, I'd appreciate you not accusing me of RAW abuse, because that is exactly what the darn thing says. Anything else is a (possibly perfectly reasonable) house rule.To represent this seemingly-random body of knowledge, a factotum gains inspiration points that he can use to activate his abilities. At the beginning of each encounter, he gains a number of inspiration points determined by his level (see Table 1-1).