Id say and this is based on my personal experience, set yourself a budget...what you are prepared to pay for one calendar year for IPTV...then split that by 3, but not equally, have a main provider for whom you will be prepared to pay more than back up services.
I tend to go with a budget of around 150 to 175 a year, with the main provider at the moment coming in at 90, then I have a service a 20 which actually is excellent, leaving around 40 to 60 a year for my number 2 service (for which I'm currently looking for a provider...!) Didn’t bother renewing last one, as content is too American, has like 80 channels, is sports service only, prob best in the game, but way too American!
Point Im making is, if one is not working turn the second or 3rd, 99 times out of 100 resolves the issue