I also believe it's not limited to 10000 copies.
Neither the sticker or ad posters (like this
one) ever mentioned it.
The only odd thing is that they intended to have a regular edition (so without the serial number and the telephone card) but it was ultimately discarded; the so-called first press limited edition is in fact the only edition.
Maybe AcidBeast still remember where he got this information as he added the notes.