.... So if you buy something like Meteobridge, which you connect to the logger, you donīt have to pay any fee (which soon compensates the approximately 50 dollars for purchasing Meteobridge) and you are absolutely free with regards to what you do with your data -...
Of course, ac2ev (who has a serial logger) would also have to purchase a serial-to-usb adapter. Not a big price addition.
For ac2ev, just to make sure it's clear. The advantage of the Meteobridge is that your PC doesn't have to run 24/7 (because the Meteobridge is taking care of the uploads). The disadvantage is that there's an additional cost to purchase the Meteobridge, as well as one more appliance to take care of.