TuS is indeed the longest running main-wa-league based website for WA, many regard it as the most successful, but what makes it a success? Well that's up to each visiter.
For me it's the best WA website, but not the best league.
If you ask me, the 3 scheme leagues were better, and you could argue the Singles/Clanners were even more active back then, making them more successful.
There was less avoiding back then, maybe because serious players had enough spare time to practise 3 schemes, unlike now where there are 8, it's kinda overwhelming for most players, people can literally spend years to get good enough to compete with the best.
Roper / Elite / BnG - The 3 original main league schemes, the true classics.
Team17 / TTRR / WxW / Shopper / Hysteria - The following up main league schemes, kind of modern classics.
Do we really need 8 schemes? Personally speaking i'd love to go back to the original 3 schemes, I know that will likely never happen but it's pretty cool to have participated that way before.