There is no limit for adding locations to the google maps within an app. However, in case you encounter any difficulties with doing that, you may try adding the locations directly into the app.xml file, by copying and pasting the code for locations: i.e.
I have over 150,000 locations and I want to query my server with the user's location and radius - I already have the code on the server ready to do this given the location (either street address so Google Maps API code geo-encode it, or geo-coordinates directly) and then using radius as well.
How can I pass this parameters to my server so I can dynamically generate the XML file?
Since you have a technical issue, please take advantage of our support ticketing system and create a ticket when you have an issue related to our service: http://seattleclouds.com/ticketcreate.aspx