I've been releasing 300dpi-equivalent* scans for years. Retromags is literally the only major source of scans still releasing them at resolutions as low as 2200px (around 200dpi). I'm not advocating releasing 600dpi scans here, but I think the time for everyone to move to 300dpi-equivalent is long overdue. (I say this fully expecting backlash from some members who value small filesizes above all else and couldn't care less what the resolution is so long as it's readable.)
*I use the term 300dpi-equivalent since we're talking about the pixel dimensions of a scan if it were scanned at 300dpi and left unchanged. Once a page has been resized -at all- it is no longer qualified to be referred to using DPI and should only be described in pixels (i.e. 2200px high). But most mags scanned at 300dpi are between 3000-3200px high, so most mags saved at those pixel dimensions are 300dpi-equivalent, even if they were scanned at 600dpi before resizing.
(Speaking of 300dpi, literally every single mag on that list from the UK - the PC Gamers and Edges - is already available in 300dpi scans at OGM. Uploading them here/the Internet Archive will be useful for the people who don't want to join OGM, but you might as well make them competitive and release them at comparable resolutions. When I scan something that's already been scanned, I do it with the goal of having my scan be the superior of the two - otherwise what's the point? At least, that's my point of view.)