I would say just follow nadechactivity + Na solo FC accounts like fcnadech_club, jane964emotion etc because they pretty much repost the Na photos that his mum posts but not the religious stuff, as well as updates on his events etc. His mum's account is largely her own personal account, it was never really meant solely for updates on Na.
Found some pics on IG that you could use to compare:
2555 is the year 2012
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2556 is the year 2013; Na didn't have a lakorn airing in December that year, I think RP aired at the beginning of the year
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Some of his events in the last few months of this year:
Anyone's popularity does/can fluctuate but I would say that Na is still doing well