It's quite difficult to say what the Russian mintmasters were thinking of when they were doing a restrike.
But one thing is very clear, that is, if an old die is suitable for striking, then it is perfectly suitable for a restrike, if not a novodel.
It seems that when a particular type of coin is proven to be too rare, or if a "pattern" design was suddenly approved for coinage, mintmasters would then make such new coins. It can be possible that there weren't enough dies and hence older dies were used. Most of the times for novodels, they were made for the insane wealthy people.
Let's take the example of the platinum rubles. A recent study of the metal spectometry has showed stunning results, that is at least three different alloys were used in striking such coins. The explanation that the report gave suggested that there were in fact at least two restrikes after the first original strikes. This was established after knowing the refineness of the platinum / iridium / rhodium levels.
But when would such platinum coins be made? The first would obviously be the time when the first platinum issues were made. However they got too unpopular and got recalled. It is difficult to know how many were melted down. Given a short period of time after that, probably in the 1850s~1880s, there were rich people who were trying to collect a type set like we do. It is quite likely that by the demands of collectors, that the first restrike was done.
The second restrike was quite likely to be done during the Soviet Stalinist era, which one would remember him giving orders to sell of some of the great Russian arts. It would not be a suprise that restrikes were made in attempt to save the original platinum coins. Now if those coins were actually dated, I am sure that collectors at that time would avoid the restrikes at costs.
Right now, would restrikes or novodels be considered as total trash? I doubt it though. Fortunately enough, mintmasters were smart enough not to overproduce such coins. Also, chances are that novodels are quite likely a better quality than the original coins. Trying to identify novodels against an original strike can prove to be VERY difficult...