Whether new or used: every piece of software is treated in the same way in terms of updates and maintenance. Let's imagine the following scenario: a version entitled to an update also retains this status as used software. The secondary purchaser can therefore acquire the required updates from the manufacture in the same way as the original purchaser.
This results in further highly attractive potential savings for many users: a company can therefore, under certain conditions, procure licenses for an older version eligible for an update cost-effectively on the second-hand market - and then purchase the corresponding updates from the manufacturers. The total cost is generally significantly lower than the price of the current full version.
Serious legal concerns were cited, were a manufacturer to refuse the maintenance of software it has produced: an abuse like this of a dominant market position would be a clear violation of European cartel law. For this reason alone, a manufacturer has not yet refused maintenance or updates.