Is there any PTC site which upgrades lasts forever???

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hi, there is a lot of PTC sites which upgrades/memberships last for only a month, six months or a year. This is just another way for them to earn more money and to stay alive in this business. I would like to know if there are some PTC sites that offers onetime paid upgrades that lasts forever (bronce, silver, golden, premium or other memberships)? If You know some site/s, please don't post referral link (because discussion will be deleted) or invite to look at Your profile, instead, just post the link of these sites so others could benefit from this discussion :) thanks :)