Using multiple Laravel scopes in OR context

Take advantage of params. You could try something like...

public function scopeCanceled($query, $scope = 'where')
{
    return $query->$scope('canceled_at');
}

then you can do for example $query->canceled('orWhere')

you can then de-uglify with:

public function scopeOrCanceled($query)
{
    return $this->scopeCanceled($query, 'orWhere');
}

example $query->orCanceled()

in general with scopes, i find it handy to always have some sort of optional value, to make things flexible

public function scopeApproved($query, bool $value = true)
{
    return $query->where('is_approved', $value);
}

adding a third param for this use case can then make sense

public function scopeApproved($query, string $scope = 'where', bool $value = true) {
    return $query->$scope('is_approved', $value);
}

Subscription::active()->orWhere( function($q){
            return $q->future() ;
        } )->get() ;

For static-context try:

$subscriptions = Subscription::query()
    ->active()
    ->orWhere(function ($query) {
        $query->future();
    })
    ->get();

First call query() to prevent errors (because we may have a non-static method with "active" as name).

Relation query ^{(as requested in the comment)}

$subscriptions = auth()->user()
    ->business()
    ->subscriptions()
    ->active()
    ->orWhere(function ($query) {
        $query->future();
    })
    ->get();

Note that above we don't need to call query() (because it's not from static-context).