Q1: This card is linked to a Digimon. If this card activates a link effect, is that effect considered a Digimon effect or an Option card effect?
It's considered a Digimon effect.
Q2: Due to an effect, I can't use an Option card. Can I pay this card's link cost and link to one of my Digimon?
Yes, you can link it. Linking a card isn't the same as using an Option card, therefore a card can still get linked when you can't use Option cards.
Offensive Plug-In V ST22-08 U Plug-In While you have a Tamer, you can ignore this card's color requirements. [Security] Delete 1 of your opponent's Digimon with the lowest DP. Then, add this card to the hand. [Main] You may link this card to 1 of your Digimon without paying the cost. Then, delete 1 of your opponent's Digimon with as much or less DP as 1 of your Digimon. --- <Link> Lv. 3 or higher: Cost 2 (Plug this card from the hand or battle area sideways into the specified Digimon in the battle area.) Link: ++2000 DPDP Link: [End of Your Turn] [Once Per Turn] This Digimon may attack.
Offensive Plug-In V ST22-08 U Plug-In While you have a Tamer, you can ignore this card's color requirements. [Security] Delete 1 of your opponent's Digimon with the lowest DP. Then, add this card to the hand. [Main] You may link this card to 1 of your Digimon without paying the cost. Then, delete 1 of your opponent's Digimon with as much or less DP as 1 of your Digimon. --- <Link> Lv. 3 or higher: Cost 2 (Plug this card from the hand or battle area sideways into the specified Digimon in the battle area.) Link: [End of Your Turn] [Once Per Turn] This Digimon may attack. Link: [Linked Together] +2000 DP
Offensive Plug-In V ST22-08 U Plug-In While you have a Tamer, you can ignore this card's color requirements. [Main] You may link this card to 1 of your Digimon without paying the cost. Then, delete 1 of your opponent's Digimon with as much or less DP as 1 of your Digimon. --- <Link> Lv. 3 or higher: Cost 2 Link: +2000DP Link: [End of Your Turn] [Once Per Turn] This Digimon may attack.
攻撃プラグインV ST22-08 U プラグイン 自分のテイマーがいる間、このカードは色条件を無視できる。 【セキュリティ】最もDPの低い相手のデジモン1体を消滅させる。その後、このカードを手札に加える。 【メイン】このカードを自分のデジモン1体にコストを支払わずにリンクできる。その後、自分のデジモン1体のDP以下の相手のデジモン1体を消滅させる。 --- 〈リンク〉Lv.3以上:コスト2(手札/バトルエリアから、このカードをバトルエリアの指定のデジモンに横向きで差し込む) リンク: +DP+2000DP リンク: 【自分のターン終了時】[ターンに1回]このデジモンでアタックできる。