There's nothing wrong with it - it's just not giving credit back properly that I have an issue with.
Take this for example, which got some front page news time in the UK:
- https://www.theguardian.com/lifeandstyle/2020/dec/27/walk-th...
- https://www.theguardian.com/travel/2020/jun/13/how-the-slow-...
- https://www.bbc.com/news/uk-54562137
Pretty much the entire thing is taken from OSM and there isn't a single mention of that on any of those pages.
(and as I understand it, Slow Ways haven't contributed back their changes to OSM which is required by the OSM license).