Handle free users with Filament and Laravel Spark using a custom Middleware. Learn more: https://silvanhagen.com/free-users-filament-laravel-spark/

AppServiceProvider.php

<?php

// namespace and more...

class AppServiceProvider extends ServiceProvider
{
    public function boot(): void
    {
        // Bind our implementation
        $this->app->bind(
            'Filament\Billing\Providers\Http\Middleware\VerifySparkBillableIsSubscribed',
            VerifyProjectIsBillable::class
        );
    }
}

FeedbackResource.php

<?php

// namespace and more ...

class FeedbackResource extends Resource
{
    // rest of the class...
  
    public static function isTenantSubscriptionRequired(Panel $panel): bool
    {
        return true;
    }
}

Project.php

<?php

// namespace and use...

class Project extends Model implements HasCurrentTenantLabel
{
    use Billable, HasFactory;

    // rest of the class...
  
    public function isBillable(): bool
    {
        return ! $this->free_forever;
    }

    public function isOnTrialOrSubscribed(): bool
    {
        return $this->onTrial() || $this->subscribed();
    }
}

VerifyProjectIsBillable.php

<?php

namespace App\Http\Middleware;

use Filament\Billing\Providers\Http\Middleware\VerifySparkBillableIsSubscribed;
use Filament\Facades\Filament;

class VerifyProjectIsBillable extends VerifySparkBillableIsSubscribed
{
    public function handle($request, $next, $subscription = 'default', $plan = null)
    {
        $project = Filament::getTenant();

        if ($this->shouldRedirectToBilling($project, $request)) {
            return parent::handle($request, $next, $subscription, $plan);
        }

        return $next($request);
    }

    protected function shouldRedirectToBilling($project, $request): bool
    {
        return $project
            && $project->isBillable()
            && ! $project->isOnTrialOrSubscribed();
    }
}