own a meme of Trump, not the meme of Trump. There can be more than one of each - its like numbered limited editions, you "own" the one that is number 34 out of 100. In this case AFAIK they haven't published a maximum release, so it could be you buy number 57000 out of 1000000.
They are very good at making money from the base. The MAGA hats were making $80k profit a day. They also made $250million in donations for the legal fight against the "stolen election" that they never spent on lawyers.
edit: correction in this case some are single editions, whilst others are in varying multiples. There are 45000 available in the "initial release".
The company running the release seems to be based here >
https://goo.gl/maps/PVVBvAbFgv1HmCph6 < which seems classy.