Restructured the project structure back to the way it was, there's no reasonable way to split the modules

src/NadekoBot/Modules/Gambling/GamblingTopLevelModule.cs

@@ -0,0 +1,68 @@
+#nullable disable
+using NadekoBot.Modules.Gambling.Services;
+using System.Numerics;
+using NadekoBot.Common;
+
+namespace NadekoBot.Modules.Gambling.Common;
+
+public abstract class GamblingModule<TService> : NadekoModule<TService>
+{
+    protected GamblingConfig Config
+        => _lazyConfig.Value;
+
+    protected string CurrencySign
+        => Config.Currency.Sign;
+
+    protected string CurrencyName
+        => Config.Currency.Name;
+
+    private readonly Lazy<GamblingConfig> _lazyConfig;
+
+    protected GamblingModule(GamblingConfigService gambService)
+        => _lazyConfig = new(() => gambService.Data);
+
+    private async Task<bool> InternalCheckBet(long amount)
+    {
+        if (amount < 1)
+            return false;
+        if (amount < Config.MinBet)
+        {
+            await ReplyErrorLocalizedAsync(strs.min_bet_limit(Format.Bold(Config.MinBet.ToString()) + CurrencySign));
+            return false;
+        }
+
+        if (Config.MaxBet > 0 && amount > Config.MaxBet)
+        {
+            await ReplyErrorLocalizedAsync(strs.max_bet_limit(Format.Bold(Config.MaxBet.ToString()) + CurrencySign));
+            return false;
+        }
+
+        return true;
+    }
+
+    protected string N<T>(T cur)
+        where T : INumber<T>
+        => CurrencyHelper.N(cur, Culture, CurrencySign);
+
+    protected Task<bool> CheckBetMandatory(long amount)
+    {
+        if (amount < 1)
+            return Task.FromResult(false);
+        return InternalCheckBet(amount);
+    }
+
+    protected Task<bool> CheckBetOptional(long amount)
+    {
+        if (amount == 0)
+            return Task.FromResult(true);
+        return InternalCheckBet(amount);
+    }
+}
+
+public abstract class GamblingSubmodule<TService> : GamblingModule<TService>
+{
+    protected GamblingSubmodule(GamblingConfigService gamblingConfService)
+        : base(gamblingConfService)
+    {
+    }
+}