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In this post you were asking about first land. Unfortunately since you bought a plot you are no longer eligible for first land. First land has to be the VERY first land that you buy with that account. Doesn't seem fair and they don't advertise that little bit very well.
Not sure how long it would take a linen to get to this since nobody knows what their holiday hours are so I thought I'd post.
Re: your land allownce you can still hold land, up to 512 sq/m. without paying additional tier, but you do have to purchase it. Do be careful that you are buying mainland parcels and not accidentally entering into a rental situation on a privately owned sim. Currently the search does not distinguish between them. Anything above 512 will add an additional monthly fee in tier charges for holding additional land.
LL does not GIVE you your first land you have to search for it and purchase it. The only difference between buying first land and buying other land is that it's available only to members who have not previously owned land for the VERY low charge of $1L/sqm.
Hope some of that helps.
MT