@mayuxi: That sort of thing doesn't violate our guidelines. If he wants to remove features and put them in a pro version, that's his call.
The guidelines specifically prohibit:
- Trialware, as in features being in the free version that self-disable after a time period, and
- Unlock codes, such as having features in the free version, hosted on our servers, which you must pay to unlock. Having a feature removed and moved to a pay version does not fit this description.