Why no support for 3rd party services?

It seems like every time I want to add a 3rd party service to my phone (weather radar, satellite imagery etc.), every other cellular provider is supported except for T-Mobile . What gives? I thought T-Mobile's digital network was supposed to be ideal for this type of thing. Doesn't T-Mobile realize that cellphones aren't just used for voice anymore?

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So far, I wouldn't urinate on a T-Mobile rep if I found him on fire! They block a HUGE number of services if you're concerned enough about pricing to use their 'to go' prepaid service - they've sold me the wrong serial cable to talk to my phone, and pretty much (after burning up ~20 minute trying to get service, and $20 worth of gas returning to the store) got "That's too bad!" as an answer to ALL of my requests and complaints...

prepaid doesnt have interenet its blocked unless its the sidekick and plus tmobile had a lot of complaints about these third party services and blocked them for e.g i had problems with jamster they resolved it and they blocked them my #