g+ is not as paranoid as facebook so you can post in a lot if you post high quality and in relevant communities, i've went up to 400 in the same day with no problem, i grow it gradually to that point though, didn't start posting like that in the first day
that should definitely be perfectly safe
All the features on the Facebook page are included :
http://www.massplanner.com/facebook-poster-features/ . There is no upsell and most people/marketers would never need any extra modules, the extra modules are a few features that are not for everybody. You can see all extra modules if you scroll down in the general features page here :
http://www.massplanner.com/features/