Nah, the forum's activity was already declining before Tapatalk took it over. No point in migrating to save a dying community, especially if you're gonna be paying money for a new server.
Nah you're full of shit and pulling it out your ass and smearing it all over your keyboard. The reason I gave is the fact of it. They didn't have access to the database any more because tye email about the changeover was sent to the forum's founder (yellowhairedguy20) who hadn't been on the forum for about 10 years. Anyone who was there and paying attention to what Tim and Rogue said will know that's the case. Everything you said is your head cannon.
You're thick as shit, because if there was no point paying for a new server, why did they pay for a new site, which cost money? Why did Cal try paying for it a few years after it had effectively died? I'm not sure yoy even thought abiut what you typed. And do you believe people don't put money into forums before they're even big, or that people don't have different ideas of what constitutes good or busy activity? Do you think a high activity level is the same on Kanzenshuu as on Sherdog? Not all are from the nsdrrw tate school of "it needs to be big and make me seem popular or powerful to be worth paying for". Do you think little indie bands quit because they aren't getting kpop levels of views? There are factors your naive mind is unable to consider I guess - sad for you.
The activity had declined since around 2015, but it clearly declined more because of the migration (which was in 2018). It was still more active than current Zeta (Nila's spam aside). Declined isn't the same low level of activity it had on the new forum, unless you only see in binary.