for exemple : i cancel the user listing or they expire,
the number's ads do not automatically update?
I see the sum
thanks M.

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@max
This depends on osclass, should be recalculated by cron on daily base, you need to check their core to get this information.
Also make sure you have cron set correctly.

@max
This depends on osclass, should be recalculated by cron on daily base, you need to check their core to get this information.
Also make sure you have cron set correctly.

I can only enable or not, right?

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@max
You should not use built-in cron, it is not for live classifieds.

 It is written to enable...

but....

thank you

however it does not work the same with or without cron

in the plugin, it says:
In order to use Seller Post plugin, you should edit your theme item detail page (item_detail.php) and add the following line anywhere in the code you want the Seller Post link to appear:

                    <?php seller_post(); ?>

I do not have page (item_detail.php)
I try not to put line...and the plugin works
I try to put line in page user-public-profile.php ..and the plugin works

only ads counts not now without cron 

if I find the solution I update the post
thanks

@max
Build in cron is only for development purpose, you should use cron server.
List seller items plugin is integrated directly in theme and therefore no action is required, code is place in item.php.
There are also some free plugins fixing counts of user items in database.

there is another plugin equal, what is its name? thanks

@max
Do not now, not using it.