Back in the 90s when I lived in Amsterdam, I also saw svp (which is actually French) used often instead of aub. I never understood why though.
Also, ff wachten for example. ff is short for effe, or rather “even”. Just wanted to throw that one into the mix.
Edit: alstublieft is also a short version of “als het uw blieft”
Sounds a bit like Gavin fucking Nelson.