They are pitching this as a launch (first 20 buyers get a discount!), but their YouTube review videos are 5 months old with 67k views (looks like paid creators).
This looks like just another paid template hustle.
And what 5months old video? I just launched it 2 days ago
Re:youtube - you link to several videos in the section "Why TanStack Start". Looking closer, they are actually about a project "Tanstack Start" (which is actually by TanStack folks) and not about this project "Tanstack Starter Kit". You linking to them confused me (as it seems it was intended to). Linking to videos as testimonials, knowing they aren't about your product, but the similarly named pre-existing product is very sketchy.
- Your logo is near copy of theirs
- Your name is near copy of theirs (just adding "er Kit")
- You link to videos about them from your homepage in a "Why" section