> I doubt that

Just tried for a few minutes all 3 of them. The C2S is a C2550, and the C2M and C2L are C2750. They each appear to be bare metal, and not virtualized. The VPS offering, which is advertised as a VPS, appears to be virtualized inside of a C2750. The C1 is a Marvell Armada 370/XP, a bare metal ARMv7l board.

> I would consider their offers "ad-supported".

This also is not my experience. I haven't ever received spam from them, nor received advertising.

> Avotons are very slow

This part of what you wrote is true, unfortunately. :(