This reminded me of Value Alliance:
[URL unfurl="true"]https://en.wikipedia.org/wiki/Value_Alliance[/URL]
No idea whats happening now given the website no longer works.
Tiger airlines back in the days of the Changi budget terminal was certainly something, for a while they didn't offer thru check and then when they did start to offer it you had to pay extra.
In more recent times you could even book TT, TR and TZ flights on the one booking but that changed when Scoot and Tigerair merged.
