Hi Carlos,
thanks a lot for your review. I would like to answer to each of your critic points.
Ad performance: we built the plugin to be as peformant as possible out of the box. Not sure which aspect you are referring to, e.g. if a map tile server has connection issues, of course the map needs longer to load – anyway those issues are beyond our control.
It is true though, that during the recent months we focused on developing our pro version, as our ressouces are limited – so for the upcoming v4.0 pro release, we significantly decreased the load times for maps with many markers (see https://www.mapsmarker.com/2018/03/15/maps-marker-pro4/ for details – 72.000 markers will load in 12sec in contrast to 28sec).
Ad advertising: not sure what you mean here – we do not include 3rd party ads into the free plugin, map tile providers require a backlink though according to their ToS.
ad free plugin: this is not true though – even though the features are limited in contrast to the pro version, the free version is fully functional and can be used to create maps without any restrictions (in contrast to e.g. other mapping plugins which only allow to create 1 map in their free version).
Nevertheless thanks again for your feedback & sorry for the late reply – we have been busy lately working on Maps Marker Pro 4.0 ??