Is there any chance to continue with the dual option even I have this third DVB-T2 tuner or am I running into a ban?
You can use a STB with triple tuner (2x satellite). The server does not interest the number of tuners you have in your satellite receiver, the server does not even recognize if you have no tuner or satellite dish at all. The server demand only
1. only one connection (one emulator on one receiver)
2. with dual login 2 simulations decoding (usually used for watching one channel and recording another one, or recording 2 channels at the same time.
Its not clear in which country you want to use DVB-T reception, but the country I know the DVB-T transmission uses own cards = not compatible with satellite reception = your receiver will not even send deconding requests for DVB-T to the cs-server as these cards are not supported by the server. So DVB-T can only be used for FTA channels.
Simple test: switch on an encrypted DVB-T channel while connected to the server > most likely nothing happens = picture not decoded >go to Billing Center > Connection history >> as long as there is no error/violation listed as I expect everything is fine.
If the DVB-T channels get decoded by cs-server (very unlikely) its also possible to use the cs-server, you only need to make sure that you only decoded a maximum of 2 channels simultaneously !
It is the same like usual STBs with 2 sat tuners and a single login subscription: works fine as long as you only decode one channel *g*
Another point is a problem with FCB-tuners (full band caputure tuners) like some new receivers have. These tuners can receive several channels/frequencies at the same time with only one hardware tuner. As far as I know this FCB-feature need to be disabled in the receiver settings to avoid problems with the server