

Q1: Can I process the part of the effect after "then" in this card's Your Turn effect without meeting the "by" condition?
No, you can't. If you don't suspend this card, the part after "then" in its Your Turn effect won't let you perform an app fuse.
Eri Karan BT23-079 R App Driver/Appmon [Start of Your Main Phase] If your opponent has a Digimon, gain 1 memory. [Your Turn] When any of your Digimon get linked, by suspending this Tamer, those Digimon get +3000 DP until your opponent's turn ends. Then, 1 of your Digimon may app fuse into a Digimon card in the hand. --- [Security] Play this card without paying the cost.
Eri Karan BT23-079 R App Driver/Appmon [Start of Your Main Phase] If your opponent has a Digimon, gain 1 memory. [Your Turn] When any of your Digimon get linked, by suspending this Tamer, those Digimon get +3000 DP until your opponent's turn ends. Then, 1 of your Digimon may app fuse into a Digimon card in the hand. --- [Security] Play this card without paying the cost.
Eri Karan BT23-079 R App Driver/Appmon [Start of Your Main Phase] If your opponent has a Digimon, gain 1 memory. [Your Turn] When any of your Digimon get linked, by suspending this Tamer, those Digimon get +3000 DP until your opponent's turn ends. Then, 1 of your Digimon may app fuse into a Digimon card in the hand. --- [Security] Play this card without paying the cost.
花嵐エリ BT23-079 R アプリドライヴァー/アプモン 【自分のメインフェイズ開始時】相手のデジモンがいるなら、メモリー+1。 【自分のターン】自分のデジモンがリンクしたとき、このテイマーをレストさせることで、相手のターン終了まで、そのデジモンをDP+3000。その後、自分のデジモン1体を手札のデジモンカードにアプ合体できる。 --- 【セキュリティ】このカードをコストを支払わずに登場させる。