They're probably just leveraging the good will they have as the plucky underdog. I personally found the app clunky and that the videos loaded really slowly, but I don't blame them for offering a lifetime subscription.
Either that, or it's just price anchoring and they weren't expecting anyone to spend $300, but it made the other options look cheaper
I use EPG dot best. They're an EPG provider who give you lots of detailed information about each channel and show/movie and nice clean logos and everything.
You can filter large EPG files from your IPTV provider into much smaller ones that only include the channels you actually watch. The smaller EPG file means that the app uses less RAM on my Nvidia Shield too
It's not free and it's kinda finicky to set up, with a weird workflow, but it works well once that's done
The only way I have found to get reliable IPTV services is to post on local Facebook groups. There is invariably a few middle-aged guys who can't spell properly and who can you "mate" who will know which service works best in your area and be resellers of said service. A few 24-hour trials and you can usually figure out what suits you best.
They voted for Selena Meyer too